睡眠トラッカーとアラーム・94アプリ・30,658件のレビューを分析
アプリについての本文は英語です。
Where sleep tracking is accurate and the sounds lull you, and where the alarm fails and ads pile up. レビュー本文のスコアが高いのはWhite Noise Lite（72/100）、SnoreLab（72）、Relax Melodies P（72）です。
順位はレビュー本文のスコア（100点満点）順です。★はApp Storeの評価です。評価について
White Noise Lite is a time-tested background noise generator for sleep, works without tracking or extra mechanics. The main weakness in recent versions: after some updates the sound cuts out when the screen locks.
評価点
Fan and rain sounds play continuously in the background without interrupting other apps running at the same time.
不満点
No way to blend multiple sounds or set a scheduled start time.
向いている人：People who want one reliable background sound without subscriptions or extra features
The best tool for recording and analyzing snoring: all-night microphone recording, intensity classification, and factor tracking. Users find real snoring triggers through weeks of experiments, though the accuracy of the epic/loud classification worsened after recent updates.
評価点
Long-term users pinpoint specific snoring triggers, including position, alcohol, and humidity, and reduce intensity over weeks.
不満点
Sound level classification has become less accurate: genuinely quiet snoring gets flagged as epic.
向いている人：People who snore or suspect sleep apnea and want to understand the causes through their own data
Relax Melodies remains one of the best soundscape builders: flexible sound mixing, binaural beats, and a long-term audience that uses the app for more than just sleep. Occasional iOS compatibility failures spoil the experience for longtime stable users.
評価点
A flexible mix editor lets you create a personal sound backdrop and use the app for sleep, work, and meditation.
不満点
After iOS updates the sound often cuts out mid-night, and previously downloaded tracks need to be re-downloaded.
向いている人：People who want a custom sound mix for sleep and focus
The reviews describe playback cutting out after updates and imported sound going missing. Testing the backdrop, saving the preset and carrying settings over all help.
Relax Melodies P、White Noise Deep Sleep Soundsほか3件
Authors report questionable classification and partners’ sounds being mixed together. What is needed is access to the original recording and a plain statement of the limits of the detection.
SnoreLab、Sleep Trackerほか3件
Authors discuss the routine changing and favorite sounds disappearing. Editing the diary by hand and quick access to a saved backdrop both help.
Napper、White Noise Babyほか3件
The reviews describe playback stopping on lock and ads arriving out of nowhere. What is needed is a calm way to start and predictable behavior across the whole session.
White Noise Lite、White Noise Deluxeほか3件
Authors discuss overloaded metrics and clipped imports. It helps to show the original intervals, the source and a way to correct a record.
AutoSleep、Pillowほか3件
One of the most polished sound apps: a solid library, clean interface, Shortcuts and HomePod integration. The only noticeable technical issue is an audible click at the loop boundary on the brown noise track.
評価点：Integration with automations and HomePod lets you trigger sounds without touching your phone.
不満点：Brown noise, the most popular type, has a noticeable click when looping that disrupts relaxation.
向いている人：People who want to set up smart sleep routines through Shortcuts or play sounds through HomePod.
One of the few apps with genuine long-term loyalty: families have used it for over a decade for children and adults alike. Stable all-night playback without crashes and reliable audio quality are its core value.
評価点：Fan sound and classic white noises play without interruption all night at any volume.
不満点：A recent update removed some sounds and broke familiar navigation, frustrating longtime users.
向いている人：Parents with infants and adults who need a simple, reliable white noise player
One of the richest selections of machine-style sounds: over 100 options with the ability to create custom mixes, plays in the background with no noticeable battery drain. The main downside is the shift to a subscription model for longtime users.
評価点：Custom mixes of multiple sounds are saved and launched with a single tap.
不満点：One popular preset contains a repeating stray click that becomes noticeable during extended listening.
向いている人：Parents with young children and anyone who wants to fine-tune background noise to their liking
A rare example of an honest free app with no ads and no paywalls: users note clean sound, convenient mixing, and faster sleep onset. Occasional random playback drops mid-night do occur.
評価点：Free access to the full sound library with no registration and no ads.
不満点：Playback occasionally stops on its own in the middle of the night.
向いている人：Anyone who wants a simple, honest sound player without subscriptions
An automatic sleep tracker via Apple Watch that requires no button presses. It collects more data than the built-in Apple Health, including breathing rate and detailed sleep stages, but after updates it periodically loses sessions and overstates wakefulness.
評価点：Users with apnea use it to catch oxygen drops and go to their doctor with real data.
不満点：The interface is overloaded: 12 metrics on one screen with no explanations, and the smart alarm is awkward to activate from the Watch.
向いている人：Apple Watch owners who want automatic tracking without manual start
One of the few mobile trackers with a smart alarm that genuinely wakes you during a light sleep phase without cutting into deep sleep. Microphone analysis of nighttime sounds works, and years of data produce trends. Accuracy has declined after recent updates according to some long-term users.
評価点：The smart alarm within a set window catches a light phase and waking up feels noticeably easier.
不満点：Nighttime tracking via the microphone is incompatible with simultaneous white noise playback.
向いている人：People who want to understand their sleep patterns through data, not just mask the silence
One of the richest sound libraries, with the ability to blend tracks and adjust the volume of each individually. Loops are stitched without audible seams, which sets this app apart from competitors. The interface is unintuitive and confusing at first.
評価点：Sound loops are seamlessly joined, and the ability to mix multiple layers with individual volume control gives precise personal tuning.
不満点：Library navigation is confusing and it is hard to save and find custom mixes.
向いている人：Audiophiles and people with tinnitus who need precise control over background sound
White Noise Deep Sleep Sounds offers a wide library of quality sounds including binaural beats, and the free set is sufficient for regular use. A critical hardware-specific issue: the app causes overheating and limits charging to 80% on certain devices when running all night.
評価点：Binaural sounds are regularly cited as the fastest way to fall asleep in 8 to 10 minutes.
不満点：No sequential playback, only simultaneous mixing, which is inconvenient for anyone who wants to change their background sound during the night.
向いている人：People who need a rich selection of nature and technical sounds without tracking
A specialized rain library with geographically tagged recordings (Scottish river, Cologne storm) that create convincing immersion. The free version is limited to six sounds, and paid packs add depth.
評価点：Recordings tied to specific locations like the Cologne storm and Scottish river sound like a real place, not a synthesized substitute.
不満点：Six sounds in the free version get repetitive quickly without purchasing expansions.
向いている人：People who can only fall asleep to rain and want variety within that one type of sound
One of the best atmospheric sound mixers: flexible mixer, support for custom recordings, and background mode all work well. The loss of user recordings after updates and the disappearance of the import feature noticeably damaged the experience for loyal users.
評価点：The mixer lets you build exactly your own atmosphere from multiple layers and listen over music or podcasts.
不満点：Imported sounds periodically disappear from saved scenes after updates.
向いている人：People who want to create personal sound atmospheres for sleep or focus.
Among white noise apps, one of the best for stable overnight playback: it does not cut out, shows no ads, runs without stopping. The sound selection covers most use cases, though customization is minimal.
評価点：Plays through the entire night without interruption and without ads breaking in.
不満点：No way to blend multiple sounds or finely tune the balance between them.
向いている人：People who want to turn it on and forget it until morning without a single interruption
Alarmy solves one task better than most competitors: physically getting heavy sleepers up through challenges (photo of an object, math, QR code). Sleep tracking is basic, and ads plus background battery use are noticeably worse than premium alternatives.
評価点：The mission before dismissing the alarm, completing a task, getting up, and walking to the right spot, genuinely prevents falling back asleep.
不満点：Running in the background overnight drains the battery faster than any other app in the category.
向いている人：Chronic heavy sleepers who need an alarm with a physical barrier to dismissal
Colored noises from green to brown with the ability to mix layers and set a fade-out timer do the job. Background playback works without issues, which not all competitors can say.
評価点：Mixing multiple noises simultaneously creates a personal sound backdrop.
不満点：Volume can only be adjusted through the system slider, there is no in-app volume control.
向いている人：People looking for a specific noise color rather than standard white noise
A mature app with a marketplace of user-created sounds and a built-in recorder. Loops are flawless. The main problem: after recent updates sound cuts off within a minute when the screen is locked, making overnight use impossible without a lit display.
評価点：A marketplace of user recordings and the ability to manually mix frequencies give an almost infinite library.
不満点：Sound cuts out when the screen locks and no setting fixes it.
向いている人：People who want to precisely tune a blend of white and brown noise frequencies to their own hearing
A focused sleep sound player with a quality library of nature sounds and a flexible mixer. The main product weakness is a three-simultaneous-track limit and occasional failures with Bluetooth.
評価点：Longtime users value the wide selection of free sounds without ads and the convenient mixer.
不満点：The three-simultaneous-track limit prevents building complex sound textures.
向いている人：People who fall asleep to nature sounds without needing any tracking features
A rich library with non-obvious recordings (airplane, air conditioner, brown noise) that are complex enough for the brain not to hear the loop. An update broke volume and background playback on some devices.
評価点：Texturally rich sounds with no audible looping keep the mind quiet all night.
不満点：The brown noise loop is audible through phone speakers but not through headphones.
向いている人：Anyone who wants a variety of white noises without being distracted by extra features
A solid sound backdrop for sleep with a flexible mixer, but the app periodically shuts off mid-night, which defeats the core function. Developers have changed sounds without notice several times, which angers longtime users.
評価点：You can blend multiple sounds into one personal atmosphere.
不満点：Playback cuts out spontaneously, making overnight reliability unstable.
向いている人：People who need a customizable noise backdrop without the cost of a separate speaker
A baby sleep tracker with an algorithm that predicts wake windows. Predictions work well for typical schedules, but the algorithm is slow to adapt when a baby transitions to a new developmental phase.
評価点：Accurately predicts the next sleep time and nap duration, which helps plan the day.
不満点：The algorithm adapts slowly when a baby transitions to a new number of naps and gives outdated recommendations for weeks.
向いている人：New parents who want to build a baby's sleep schedule from data rather than intuition.
A proven choice for newborns and infants: multiple generations of parents confirm the effectiveness of white noise. Product weaknesses include no gradual fade-out timer and sound that sometimes stops every 30 minutes without the paid version.
評価点：White noise and the mountain river sound reliably calm newborns and help them stay asleep.
不満点：Without the paid version, playback stops rather than looping indefinitely.
向いている人：Parents with newborns and infants
The sound library itself is good: mixes of storm, piano, and ocean genuinely help users fall asleep according to longtime reviewers. The main product problem is loud ads triggering right during nighttime use.
評価点：The ability to mix multiple sounds at once sets the app apart from simple players.
不満点：Sounds sometimes cut out randomly mid-night with no automatic resumption.
向いている人：People with trouble falling asleep who need a background sound layer
Smart Sleep Coach by Pampers addresses the narrow task of training a baby's sleep schedule: the algorithm predicts a sleep window and adjusts the routine based on real sleep data. The app works for its audience, though advice is not personalized to each baby's individual rhythm.
評価点：The sleep window predictor genuinely works and helps parents catch the right moment before overstimulation.
不満点：After four to five months the schedule stops adapting to the baby's individual rhythm and delivers generic recommendations.
向いている人：Parents of newborns building their first sleep routine
Calm is primarily meditations and sleep stories, not sleep tracking. The sound library is good, but the current version regularly breaks background sounds and aggressively requests ratings right when you are trying to relax.
評価点：The voices of narrators and sleep stories genuinely lull users to sleep, with specific storytellers getting special praise.
不満点：No personalized playlists or manual sound mix control, and content navigation is confusing.
向いている人：People who want meditations and storytelling to fall asleep to, not pure sound
A sleep sound machine with quality nature presets and a convenient timer. Holds audio all night well, but limits the mixer to a single slot and has not updated its library in a long time.
評価点：Travelers use it year after year as a substitute for a physical sound machine in hotel rooms.
不満点：The mixer only lets you create one custom mix, blending multiple at once is not possible.
向いている人：People who frequently stay in hotels and want to block out outside noise
The narrative-first approach works: gently told stories switch the brain away from anxious thoughts better than noise alone. Sleep meditations are also highlighted as useful. Content updates are infrequent.
評価点：Softly narrated stories turn off the inner monologue better than white noise.
不満点：Stories do not remember playback position and restart from the beginning every time.
向いている人：People whose minds cannot shut off to silence or noise but do respond to narrative
Meditations and sounds for sleep work: users fall asleep before the session ends. There is no sleep tracking as such, this is a relaxation app, not a sleep phase analyzer.
評価点：Guided sleep meditations disconnect you from thoughts better than noise alone.
不満点：Content runs out quickly with frequent use, and the AI assistant Soul feels unpolished and untrustworthy.
向いている人：People who cannot turn their head off before sleep
Sleepwave handles gentle waking and nighttime sound monitoring well, and Apple Health integration is stable. However, after several updates the smart alarm began changing its sound and volume on its own, and the screen takes several minutes to load.
評価点：Gradual waking during a light sleep phase noticeably reduces morning grogginess.
不満点：The smart alarm spontaneously changes settings after updates and sometimes fails to go off at all.
向いている人：People tired of being jolted awake by a sharp alarm
A wide library of themed relaxation and sleep radio stations with good audio quality. Ads break in mid-night on the free plan, and the sleep timer stopped working for subscribers after the latest update.
評価点：Works as background for an office, a spa, or falling asleep without needing any manual setup.
不満点：The sleep timer is broken after the latest update, which is critical for overnight use.
向いている人：People who want a radio-format relaxation music stream without building a playlist manually.
The multi-track mix editor works, and users create their own combinations. The timer sometimes stops early and wakes people in the middle of the night.
評価点：You can layer multiple sounds and save your favorite mix.
不満点：Adjusting the volume of individual tracks in a mix turns them off instead of fading them.
向いている人：People who want to build a personal sound backdrop from multiple layers
Sleep Number is a companion to a smart mattress, not a standalone tracker. Tracking works through bed biometrics and is more accurate than a phone microphone, but it is tied to specific hardware and loses its value without it.
評価点：When the mattress and app are linked, the morning SleepIQ score with personal recommendations feels like real feedback.
不満点：The sleep schedule is rigidly tied to the calculated circadian rhythm and does not allow manual adjustment for shift work.
向いている人：Sleep Number mattress owners who want sleep data without a separate device
A sleep tracker via Apple Watch with phases, nighttime sound recording, and blood oxygen. Phase accuracy is acceptable, but the app misidentifies sleep during low activity and forces a trial subscription from the very start.
評価点：Longtime users value the sleep quality visualization and nighttime sound recording through the Watch.
不満点：The algorithm confuses lying still with deep sleep and falsely logs driving in a car as sleep.
向いている人：Apple Watch owners who want sleep phases and nighttime sounds in one place
The algorithmically generated sound stream adapts to time of day and genuinely helps some users with focus and sleep onset. The smart alarm is mentioned as a working mechanism. The interface is cluttered, and ads inside a paid subscription undermine trust.
評価点：The sound environment shifts with the time of day and does not feel like a static loop.
不満点：Content shown in ads is not findable inside the app.
向いている人：People with ADHD or hearing that is sensitive to monotony
A sleep ritual combining breathing exercises, sounds, and snore tracking works as a unified cycle. The main drawbacks are crashes during the breathing section and a story catalog that gets exhausted quickly.
評価点：Built-in snore recording overnight is valued by those who want to hear themselves.
不満点：The story and meditation library updates infrequently and the content gets repetitive within a few weeks.
向いている人：People who want a complete evening ritual in one app
The only alarm that is guaranteed to get heavy sleepers up, and that is a real merit. However, after it fires it keeps blaring even when dismissed, and the only way to stop it is to delete the app, turning every morning into a reinstall ritual.
評価点：Extremely loud and annoying sounds that are physically impossible to sleep through.
不満点：After the alarm fires there is no standard way to turn it off, so you have to delete and reinstall the app.
向いている人：Chronic heavy sleepers for whom getting up matters more than having a pleasant experience
Ocean Wave Sounds offers quality ocean surf recordings that longtime users consider the best in the category for sleep onset and tinnitus masking. However, a persistent playback failure when the screen is locked regularly interrupts sound during the night.
評価点：Natural, unobtrusive wave sounds that users have been listening to for years and call the best in the category.
不満点：The app stops playback when the screen locks, and the sleep timer resets itself to 15 minutes.
向いている人：People who can only fall asleep to ocean sounds
Brown and white noise sound convincing and genuinely help with tinnitus and sensory overload. The app requires a restart after every launch due to a persistent hang during loading.
評価点：The deep brown noise has a noticeably calming effect that users describe as unlike anything else.
不満点：After every launch the app hangs and must be closed and reopened, making this a mandatory ritual.
向いている人：People who fall asleep to fan noise or who have tinnitus.
Forces heavy sleepers out of bed through math tasks and escalating sound. However, it fires unreliably and some users have still overslept.
評価点：The task mode before dismissing the alarm genuinely prevents drifting back to sleep.
不満点：The alarm sometimes does not fire at all or changes its sound without any user input.
向いている人：Chronic five-more-minutes types who habitually dismiss alarms without waking up
A time-tested sound generator with a flexible mixer that is great for travel. After recent updates, however, the app no longer saves settings between sessions and you have to pick sounds from scratch every time.
評価点：A wide range of combinable sounds effectively masks construction noise, neighbors, and city ambience.
不満点：After an update, settings are not saved and you have to build the mix from scratch each time.
向いている人：Travelers and anyone who lives in a noisy environment
A good atmospheric sound library with flexible mixing and preset saving. The key product problem: the sleep timer does not stop playback after the screen turns off, so sound plays all night.
評価点：Fine volume control for each sound and the ability to save custom mixes.
不満点：The timer does not stop playback when the screen is locked, and some sounds are duplicated under different names.
向いている人：People who create personal sound backdrops for sleep and reading
The app records nighttime sounds and provides a basic picture of sleep phases, which is useful for a general understanding of your routine. Phase accuracy is low, and you cannot listen to recorded sounds without a subscription, which removes the main feature for most free users.
評価点：Nighttime sound recording helps detect snoring, sleep talking, or a restless pet nearby.
不満点：Listening to sounds recorded at night requires a subscription, even though recording is presented as a basic feature.
向いている人：People who suspect they snore or talk in their sleep and want to document it
BetterSleep is a strong sound mixer with a flexible timer and a broad library, but the abrupt move of previously free presets behind a paywall destroyed loyalty among longtime users. The product itself sounds good when you have access.
評価点：The ability to blend multiple sounds into one preset and save it is a unique mechanic among competitors.
不満点：There is no guarantee that a sound you have gotten used to will still be in the free tier tomorrow.
向いている人：People willing to pay for a custom personal sound backdrop builder
The app does one thing and does it well: fan noise is convincing and plays in the background even with the screen off. The weak points are the single-sound catalog and the one-hour limit on the free version.
評価点：The sound is dense enough to mask the environment without a real fan.
不満点：Only one sound in the entire catalog, with no option to mix or choose a variation.
向いている人：People who specifically need a fan, not just white noise in general
Rain sounds are pleasant and help with sleep, but the volume is below normal and simultaneous playback with another app is not supported. There is no timer, and notifications are pushy from the first minutes after installation.
評価点：Simple and unpretentious selection of rain and storm sounds without unnecessary categories.
不満点：Sound cannot be blended with music from other apps, and the volume is too quiet even at maximum.
向いている人：People who want quick rain as background and nothing else
SleepScore uses the phone's sonar for contactless sleep phase analysis and generally identifies the moment of sleep onset correctly. The key problem: the developer removed the detailed sleep stage chart from the interface, sharply reducing value for users who tracked their progress.
評価点：Users appreciate the contactless sonar-based method and the ability to monitor sleep without a wearable.
不満点：The removed sleep stage chart stripped the app of its main analytical tool, and the sonar emits an audible high-frequency sound that interferes with falling asleep.
向いている人：People who want basic tracking without a smartwatch
A basic mixer of nature and binaural sounds with custom sets. The timer regularly fails to fire and music plays all night, and the content has barely been updated in years.
評価点：Binaural sounds combined with nature in the background work well under audiobooks and podcasts.
不満点：The sleep timer does not work reliably: sounds keep playing all night instead of stopping as scheduled.
向いている人：People looking for a simple free background for falling asleep without complex settings.
A set of specialized baby sounds (hair dryer, vacuum, womb) aimed at replacing a stationary sound machine on the go. The app sometimes shuts off mid-night, waking the baby.
評価点：Specific sounds like a hair dryer and vacuum calm newborns better than standard white noise.
不満点：The playback timer sometimes fires earlier than the set time and interrupts the baby's sleep.
向いている人：Parents of newborns who need a travel substitute for a physical sound machine
The app is built around the concept of sleep debt and predicts energy peaks throughout the day. The idea is sound, but Apple Health imports truncate sleep sessions by several hours and the AI coach repeats the same questions instead of working with data already entered.
評価点：Users with children appreciate reminders about their real sleep schedule and the deficit estimate.
不満点：The algorithm handles split sleep and shift schedules poorly and loses sleep blocks during import.
向いている人：People who want to understand their chronotype and manage sleep debt across the week
Alarm Clock Sleep Sounds Plus offers a good sound library and a gradual waking concept with a loyal long-term audience. The main problem: the alarm fires unreliably, which is critical for this type of app.
評価点：A rich selection of sleep sounds and the soft waking concept that users grow attached to over years.
不満点：The alarm often does not fire at all or produces no sound despite active settings.
向いている人：People who want a variety of sleep sounds and an alarm in one app
ShutEye can record snoring, identify sleep phases, and play white noise, but tracking periodically freezes on one value for weeks and nighttime recordings stop mid-sleep without warning.
評価点：Recording voices and sounds during sleep works and people genuinely hear themselves and family members.
不満点：The sleep phase algorithm does not distinguish the user's own snoring from sounds made by a partner in the room.
向いている人：Curious people who want to hear what happens overnight once, without serious monitoring
A simple Apple Health sleep data visualizer: it shows sleep phases quickly and without extra taps, which is the point. But starting around 2022 accuracy degraded, some nights are not recorded at all, and the trends section crashes on new devices.
評価点：Instant overview of sleep phases right on launch, no digging through Apple Health.
不満点：Records nights unreliably: some sessions disappear without explanation, precisely when the data is needed most.
向いている人：Apple Watch users who want a quick nightly overview without opening Health
Nighttime sound recording works for half of users reliably, and for the other half tracking simply stops without a result. The product is rough: the UI is small and hard to read, and overnight reliability is inconsistent.
評価点：When it works, it catches snoring and sleep talking even with the phone far from the bed.
不満点：Tracking cuts off in roughly half of nights for no visible reason, leaving no data in the morning.
向いている人：People who want to check whether they snore and are willing to deal with inconsistency.
Good sound selection with the ability to customize mixes, but audible loop seams in white and pink noise destroy the sense of continuity and wake users up. Ads with audio inserts during the night are no better.
評価点：A large variety of sounds and mix customization that works without extra effort.
不満点：White noise loops are stitched with a noticeable gap that is clearly audible when falling asleep.
向いている人：People looking for nature sounds rather than pure white noise
A veteran app with a rich data history and a gentle smart alarm, but the developer abandoned support and broke key features in recent updates. Accelerometer accuracy is moderate: nighttime wake-ups are sometimes not logged.
評価点：The smart alarm wakes you gently during a light sleep phase without a sharp sound.
不満点：Sleep tagging is broken in the current version and the app has not been updated in years.
向いている人：Longtime users who value the accumulated data archive
An app with binaural beats and atmospheric sounds for relaxation, with a background mode over other apps. Sound quality is good, but the sleep timer periodically fails, the phone heats up during extended playback, and the sleep-specific library is small.
評価点：Background mode lets you listen to beats alongside an audiobook or podcast.
不満点：Few tracks specifically for sleep, and device heating during overnight playback.
向いている人：People looking for binaural beats for meditation or focus, not specifically sleep tracking
A Calm spin-off focused on nighttime sleep. The key problem: offline downloads do not work, the battery drains to zero overnight, and the functionality almost entirely duplicates the main Calm app with no clear advantages.
評価点：Sleep stories voiced by specific narrators work noticeably better than silence or music.
不満点：Offline playback does not work despite the documented download feature, making the app useless on a plane or without a connection.
向いている人：Existing Calm subscribers who want a separate minimalist interface for night mode.
Sorts nighttime sounds by category (speech, snoring, noise) and is useful for sleep self-diagnosis. Quality degraded after recent updates: classification slowed down and access to recordings is tightly restricted without a subscription.
評価点：Automatic sorting by sound type saves time when reviewing hours of recordings.
不満点：Speech and snoring recognition increasingly mixes up categories and has stopped working quickly.
向いている人：People curious about what happens while they sleep and willing to pay for access to full recordings
A companion app for ResMed CPAP devices with data on mask seal and apnea events. The value for CPAP users is clear, but the app systematically loses sync for several days, has no dark mode, and does not export data to Apple Health.
評価点：CPAP users get access to pressure data and apnea events that are available nowhere else.
不満点：Sync with the device regularly drops for a day or two, leaving users without data.
向いている人：Exclusively for owners of ResMed AirSense 10 or 11 devices
A reasonable sound and bedtime story library, but a noticeable hard cut in the ocean sound loop signals careless audio editing. Background playback breaks in iOS silent mode.
評価点：Combining sound backdrop with audio stories helps quiet the mind faster than noise alone.
不満点：A hard loop in nature sounds is audible and breaks immersion.
向いている人：People who fall asleep to stories rather than pure noise
Mattress cooling genuinely improves sleep, but the app handles the tracker role poorly: sleep phase data is inaccurate, the autopilot is intrusive and misreads sleep onset time. Apple Sleep analytics is often more accurate.
評価点：Separate temperature control for each side of the mattress eliminates conflicts between partners.
不満点：The autopilot algorithm poorly separates time in bed from actual sleep and frequently gives irrelevant advice.
向いている人：People who sleep poorly due to overheating and are willing to invest in hardware
The sound and meditation selection is decent, but two key defects prevent nighttime use: the sleep timer does not work, and sound loops have audible seams that interfere with falling asleep. Requires a constant internet connection, ruling out use on a plane or off-grid.
評価点：A wide range of formats: nature sounds, meditations, bedtime stories.
不満点：Sound loops with a noticeable seam destroy immersion, which is critical for sleep onset.
向いている人：People who want a sleep meditation rather than background noise all night
Sleep Time has a history of reliable performance and an interesting dial-style alarm interface, but over recent years the sleep phase tracking degraded due to iOS restrictions and the alarm now fires unpredictably.
評価点：Users long valued the smart waking feature during a light phase and the convenient circular alarm interface.
不満点：Sleep phase tracking has effectively stopped working after iOS changes and the app has become a simple alarm clock.
向いている人：Users who prefer a minimalist alarm with no deep analytics
A basic snore detector with nighttime sound recording. Playback is unreliable, some nights record nothing at all, and the player scrubber is broken.
評価点：Recordings are convenient to review for assessing snoring type right inside the app.
不満点：For some nights the app shows an empty result with no explanation: no recording exists even though the session was started.
向いている人：People who want a basic check for snoring without buying a specialized device.
A broad library of white and nature noises with mix capability, but ads with explicit imagery have become a systemic problem. Sound sometimes cuts out on its own overnight.
評価点：Seamless loops without pauses and a wide sound selection including rare options like restaurant ambience.
不満点：No ad network filtering, which means inappropriate content regularly appears in a sleep app.
向いている人：Travelers who need reliable background sound in unfamiliar hotels
A decent sound library, but an audible pause when looping tracks destroys the sense of immersion at the most critical moment of falling asleep. The alarm is stuck at midnight for many users.
評価点：Clean recordings without background artifacts and no ads after a one-time purchase.
不満点：A noticeable click at the loop boundary prevents sinking into sleep.
向いている人：People looking for a one-time purchase with no subscription for background noise
Bedtime Fan does one thing well: it simulates fan sound for sleep. However, the ad network in the free version shows explicit content, which is critical for an app positioned as a sleep aid for children and families.
評価点：Realistic fan sound masks neighbor noise and helps with sleep even in a noisy environment.
不満点：Sound sometimes turns on by itself when opening the camera or using the device in the background.
向いている人：Solo users without children who need a fan sound while traveling
A simple set of fan sounds with a timer. The core product problem: ads play during the night and wake the user, which completely defeats the app's function.
評価点：Accurately reproduces the sound of a real fan, which is convenient on the road instead of a device.
不満点：Ads play mid-night and interrupt sleep, making the free plan unsuitable for its intended use.
向いている人：People who fall asleep to a fan and are ready to pay for the ad-free version immediately.
A basic set of eastern relaxing music with no smart functionality. Works as a background player but sometimes stops playback on its own without reason.
評価点：Soft eastern melodies help relax and fall asleep faster.
不満点：Does not connect to Bluetooth speakers, and there is no way to create custom mixes.
向いている人：People who fall asleep to ethnic music and do not need anything complex
A visually appealing interface and detailed sleep charts, but phase data changes throughout the day, which undermines trust in tracking accuracy. Snore and cough recording works, a smart alarm is present, but watch sync stability leaves much to be desired.
評価点：Detailed explanations of sleep phases and recording of snoring and background sounds during the night.
不満点：REM and deep sleep data change retrospectively, sessions are sometimes missed or dated incorrectly.
向いている人：Apple Watch users who want attractive sleep visualization
The app depends on a proprietary mattress sensor, and once that connection drops, data becomes meaningless or disappears entirely. Some users praise accuracy over several years, while others cannot connect the device at all.
評価点：Accurate sleep phase detection for those whose sensor works reliably.
不満点：The app does not work independently: without the mattress sensor it is useless, and reconnection after a router change or new phone breaks.
向いている人：Owners of a specific Beautyrest mattress with a built-in sensor
NapBot takes Apple Watch data and tries to build sleep analysis from it including an apnea risk score. In practice the app often loses part of the night, does not pull data from past days without being manually opened, and inaccurately tracks the moment of waking.
評価点：For Apple Watch users without built-in tracking (family account), this is one of the few working solutions.
不満点：The app does not automatically detect waking up and regularly misses part of the night, skewing the picture.
向いている人：Apple Watch owners for whom standard Apple tracking does not work
Originally a simple and solid fan sound player, but after a change of ownership the app lost some sounds and became unnecessarily bloated. The sound itself helps with sleep, but the selection of variations is very limited.
評価点：The monotonous fan sound masks outside noise and helps fall asleep quickly.
不満点：After the redesign some sound options disappeared, and there is no auto-off timer.
向いている人：People who are used to falling asleep to a fan on business trips
One fan sound that genuinely works as noise masking. Aggressive ads with a broken close button turned a basic utility into a daily irritant.
評価点：The authentic fan hum instantly muffles background noises.
不満点：Only one sound type, no timer with clear feedback, and no background playback on iOS.
向いている人：People who sleep only with a fan and are willing to tolerate ads
Sounds periodically cut out overnight, directly disrupting the core function. The smart alarm consistently fires 10 to 12 minutes early, and nighttime sound tracking behind a paywall is poorly explained upfront.
評価点：Clear charts give a general picture of sleep patterns without complex setup.
不満点：Sounds cut out mid-night, breaking sleep instead of supporting it.
向いている人：People who need a simple schedule tracker without accuracy claims
The app records nighttime sounds based on a sensitivity threshold and can help detect apnea or nighttime muttering. But recording regularly cuts out, the screen must be kept on, and the interface is hard to read.
評価点：The sensitivity threshold filters out silence and retains only moments when something interesting happens.
不満点：Recording frequently cuts out overnight and often captures nothing at all for the entire night.
向いている人：People who suspect nighttime muttering or apnea and want a quick first look
A wide selection of frequencies (528 Hz and others) attracts those who believe in sound therapy, and some users do report real sleep improvement. The key problem: one user reports loops with noticeable silence gaps, which is critical for light sleepers.
評価点：A large selection of frequencies and atmospheres for different goals: deep sleep, relaxation, inspiration.
不満点：Some sound loops have silence gaps, which can wake a light sleeper.
向いている人：People interested in sound therapy and frequency-based approaches
Mattress sensors provide data a phone cannot collect, but the app itself is unstable: it fails to record air data after an update, mixes up sleep patterns for two users on the same bed, and crashes regularly. Without a working bed there is no value.
評価点：Detailed phase and bed temperature analytics are appreciated by those for whom everything works.
不満点：The sleep editing feature does not work, and data for two users on one bed often gets mixed up.
向いている人：Owners of a Tempur-Pedic mattress with a built-in tracker
The concept is simple and clear, but the product is unpolished: you cannot change or cancel an alarm without deleting the app, and there are no repeating alarms. Users also report aggressive ads with inappropriate content.
評価点：Instant one-tap alarm setting with no extra screens.
不満点：After setting an alarm there is no way to change the time or disable it without fully deleting the app.
向いている人：People who need exactly one alarm for today and nothing else
Sleep++ was once a convenient bridge between Apple Watch and clear sleep analytics, but the app is clearly abandoned: automatic tracking fails more and more often, support is silent, and inappropriate content is appearing in the ad inventory.
評価点：Free access to basic sleep phase data from Apple Watch with no unnecessary complexity.
不満点：Automatic tracking regularly fails, support has not responded in months, and ads are not moderated.
向いている人：People who need minimal free sleep tracking with Apple Watch
A rich library with the ability to combine sounds and bedtime stories is genuinely liked by paying users. However, aggressive onboarding with no way to exit the subscription screen and short audible sound loops reduce the value.
評価点：Audio stories paired with background sounds help the mind switch off and fall asleep faster.
不満点：Sound loops are too short and repeat noticeably, which distracts from falling asleep.
向いている人：People who want audio stories at night combined with a sound backdrop
Headspace became an overloaded content portal after rebranding: the daily structure was removed, an intrusive AI chatbot was added, and the design got worse. Meditations and sleep sounds themselves are functional but hard to find.
評価点：Andy Puddicombe's core meditation method is still valued by those who know it.
不満点：There is no clear daily session structure and deciding what to listen to requires too much navigation.
向いている人：Longtime premium users who know the content and do not depend on navigation
The app records nighttime sounds, but playback of captured segments regularly does not work, turning the core feature into a promise without results. Product value is extremely low.
評価点：The concept of recording and playing back nighttime sounds appeals to users and sparks curiosity.
不満点：Playback of saved recordings is frequently completely unavailable, making the sound monitoring function useless.
向いている人：Curious users who want to hear their own snoring
It was once a clean single-purpose fan noise utility, but after an update ads play at full volume in the middle of the night and block the entire interface. Background playback is unreliable.
評価点：Compact and instant start with no extra settings.
不満点：No sound options beyond the basic fan, the library does not expand.
向いている人：Former users who remember the version without ads
A radio alarm clock with a set of nature sounds for sleep, basic functionality but unreliable: the algorithm sometimes does not recognize a date change and the alarm fires silently. No sleep tracking at all.
評価点：Waking up to internet radio is more pleasant than standard ringtones.
不満点：The alarm periodically fails at midnight rollover, a critical failure for its core function.
向いている人：People who want to wake up to radio, not sleep tracking
SleepWatch relies on Apple Watch data and theoretically can build sleep trends, but in its current state the app mass-freezes on the launch screen for users with new devices, making all functionality inaccessible.
評価点：When it works, the morning dashboard with condensed sleep metrics is praised for being informative.
不満点：No way to add custom tags to the sleep journal, only from a fixed list with irrelevant options.
向いている人：Apple Watch owners who are willing to deal with launch instability
A companion app to the physical Hatch Restore device, which is popular in its own right, but the app runs slowly, loses saved alarms, and does not allow device control during a firmware update. The sound library has value but reliability is lacking.
評価点：The Hatch Restore device itself with its soft sunrise light is loved by users.
不満点：Alarms disappear after saving and the app freezes during device firmware updates.
向いている人：Owners of a physical Hatch Restore device who have no other option
The tracker is built into a Tempur-Pedic mattress and is meaningless without it. Sleep latency data systematically overstates the time to fall asleep by 1 to 2 hours, and the sensor mixes up two partners. That said, smart bed control via the app works normally for some users.
評価点：Controlling smart bed functions like vibration and tilt from your phone without a physical remote.
不満点：The tracker regularly confuses the two partners and attributes sleep to the wrong person.
向いている人：Owners of Tempur-Pedic mattresses with a built-in sensor
The smart alarm fires too early, sleep phase data gets lost every seventh or so launch, and the app periodically simply stops starting. Tracking as the core function is unreliable.
評価点：The sleep debt concept and visual design are valued by users for whom the app runs stably.
不満点：The microphone poorly captures sleep sounds, and the smart alarm regularly wakes users too early.
向いている人：Patient users willing to deal with instability for the sake of attractive charts
One critical flaw makes the app nearly unusable for sleep: sound and stories stop when the screen goes off. The user must keep the screen active to hear audio, which directly contradicts the purpose of a sleep app.
評価点：Bedtime voice stories with live narrators, particularly specific authors like Michael Karnes.
不満点：Playback stops when the screen locks, making overnight use practically impossible.
向いている人：Children and teenagers who listen to stories with the screen in hand while staying awake
The app plays sleep sounds but does not continue in the background without a purchase. Real audience depth and the true quality of the sound library are unknown due to rating manipulation.
評価点：A simple sound mix quickly settles children and helps adults relax.
不満点：Playback stops when leaving the app without the paid version.
向いている人：People who need the simplest sound player with no extra features
The app aggressively solicits ratings before the user has had a chance to use it. There are almost no real reviews about tracking quality.
評価点：A few users noted that basic sleep tracking works without needing to pay.
不満点：The alarm does not fire at the right time and recording and analytics features are practically inaccessible without payment.
向いている人：People who just want to start overnight recording without complex setup
An alarm clock app with a basic display that requires keeping the screen on all night and regularly misses its alarm. Aggressive ads make setting an alarm nearly impossible.
評価点：The option to wake up to tracks from Apple Music is appreciated by some users.
不満点：Requires the screen on constantly, and the alarm regularly fails to fire.
向いている人：Only suitable for people who keep their phone charging and can tolerate ads
The app forces a five-star review to unlock access, while offering minimal functionality. The actual sound library is tiny and users do not understand what they paid for.
評価点：A few sounds do genuinely help with relaxation before sleep.
不満点：A very small sound library with no meditations or stories, contrary to expectations.
向いている人：No one looking for a real sleep app
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