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Carb Manager: Keto & Macro Log reviews

What users love and hate · 500 reviews analyzed · ★ 4.3

A niche keto/macro tracker that wins on a free barcode scanner and a custom-recipe builder, but fights its own positioning: it sells itself as a "carb manager" yet front-loads a calorie goal and leans on a user-generated database whose numbers contradict each other.

What users love

The free barcode scanner is the hook that pulls people off MyFitnessPal

Rivals lock the scanner and custom foods behind a paywall; here they ship free, so the core scan-and-log loop works without paying and kills entry friction on day one. That's the actual switching trigger: users call the scanner fast, unlimited, and the deciding factor over paid competitors.

the food database and bar scanner are excellent

Other apps want you to pay to use the barcode scanner or create custom foods, not Carb Manager

it lets you scan barcodes FOR FREE!

The custom-recipe builder turns the database into a personal one — loyalty is built here

When the shared database lacks a food or lies, the user can build their own recipe and food with verified values — and that's what retains home cooks and complex-diet users who'd otherwise have nothing to lean on. The ability to "fix" the data for yourself turns the database's weakness into a retention tool: leaving means losing the personal library you've built.

I really like the fact that I can input my own recipes with my own ingredients and get accurate nutrition facts for my homemade meals

If you can't find something in the database then you build it yourself in the recipe builder

You are better off creating your own food or only using food that has been verified

Long-term retention rides on visible weight and blood-sugar results

The most loyal reviews aren't about features but measurable outcomes: 100–125 lbs lost in a year, glucose dropping, reaching maintenance. When the tracker attaches to a concrete health result it stops being an app and becomes part of a regimen — hence the multi-year users and the switching away from other trackers to this one.

down 21 pounds and now on maintenance

easy to use and worth every penny lost 125lbs in my first year

it's great help. over the course of time I was able to lose 100 lb in about a year

Gamification (challenges, milestones, feed) turns logging into a habit for people who hate tracking

Monthly challenges, milestones and a social feed turn dull food logging into accountability through competition with others — and that pulls in the audience that normally quits trackers within a week. Some users say outright they hate tracking but here it's "even enjoyable": the streak-of-progress and community mechanic keeps them in the loop.

my favorite is the Challenges and gaming the activity with others. it helps keep me accountable

It also has a useful (I find it highly motivating) Milestones function and Monthly Challenges

Typically I hate tracking, but so far Carb Manager has made it easy and even enjoyable

The free tier is generous enough to be the product itself

Unlike rivals where nothing works without paying, here basic calorie/carb/protein/water tracking, the scanner and custom recipes are all free — and many users stay on the free tier for years without feeling crippled. That generosity is the acquisition strategy: it defuses the "pay for everything again" fear and turns happy free users into word-of-mouth.

Best FREE functionality and features for calorie, carb, fat and protein tracking!

A subscription is not required for the app to be effective or easy to use

Works well even without buying premium. I have lost nearly 24 pounds in the 5 months I have used the app

The visual macro presentation (pie chart) is what keeps visual learners

The macro pie chart gives an instant at-a-glance picture of where you stand on protein/fat/carbs — and that hooks the audience that processes information visually and abandons table-of-numbers trackers. The presentation of data, not the data itself, becomes the differentiator: people name the pie chart specifically as why they finally understand their eating and stick with the app.

I use the free version and I find the pie chart style of counting my macros is really beneficial for me as a visual person

The macros pie chart is a great at a glance for keeping your P/C/F on track

easy to use, cute graphics and the best out of all calorie counters I've tried

What users hate

The crowdsourced database is both the catalog's breadth and the poison in its trust

The same food sits in the database as several conflicting entries because users publish them with no moderation. For an app whose whole point is accurate macro counting, that breaks the core function: people stop trusting any number and end up hand-checking every entry, which eats the very time savings the tracker promised.

So many food listed multiple times have different values

There needs to be some verification on the part of the Carb Manager side prior to any food being published

You are better off creating your own food or only using food that has been verified

The recipe calculator does its own math wrong — and that hurts the core worse than bad user entries

Even when the user enters verified ingredients themselves, the recipe and daily totals don't reconcile: 15g of carbs becomes 25–26, and the calorie budget contradicts the protein/fat/carb budget. This isn't crowdsourcing — it's the app's own arithmetic, and it's what finally breaks trust: a tracker that can't add up is pointless.

I entered my own recipe and verified the net carb count on each ingredient

Not just incorrect but also incorrect. Its pointless if it doesn't add correctly

I can't trust any of the calculations after seeing that

The "carb manager" promise collides with a calorie-first onboarding

The name promises carb tracking, but the first screen forces a calorie goal and behaves like a calorie counter — which directly contradicts the low-carb audience's logic, who came to lower insulin, not cut calories. The most precise users (keto, diabetic) catch the conflict instantly and read it as a betrayal of the exact promise they downloaded for.

when you open it up the first thing they do is have you set up a calorie goal

The whole entire point of low carb diets is to lower insulin or blood sugar

Actually a calorie manager that allows tracking carbs but is calorie centric

The always-online architecture kills the app exactly where a tracker is needed most

The app demands internet even for basic logging: on a weak connection a splash screen pops up and blocks access to your own data until the network returns. For a food tracker opened on the move — in a store, a cafe, on the road — that's a failure at the exact moment of use: people leave not over features but because they can't log lunch without wifi.

it is highly flawed due to its always online nature

a splash screen appears forcing you to connect to the internet before you are able to literally anything

tells me all of the time that I've got no internet connection but yet all other apps are running fine

The captcha login locks out existing users — and cuts off the very people with vision issues

To get into their own account, users must clear a visual hCaptcha puzzle that fails over and over — especially for people with vision problems who physically can't read the images. This isn't new-user onboarding, it's a returning user with all their data inside: the app locks the person out of their own history and pushes them to a competitor.

match the things that are most alike won't EVER verify me & let me log into the account I created

can't get past this stupid puzzle thing because I have vision issues

hCaptcha for every login!!

Integrations with wearables shine — but the Samsung Health gap cuts half the Android base

The app links easily to Fitbit, Garmin and Apple Health, but won't push data to Samsung Health or Health Connect — a huge slice of Android users on Samsung watches. People explicitly dock a star and keep a third-party workaround solely over this gap: an integration strength becomes a pinpoint loss exactly where the ecosystem is largest.

Great app, but please allow to connect to Samsung Health

Would be 5 stars if nutrition data was shared with Health Connect

I need a 3rd party app to get it to link to my Samsung watch

Ounces-and-cups defaults push out everyone outside the US

The database and units are built for the US: weight only in ounces, portions in "cups", American brands, and the Australian/British net-carb logic has to be recomputed by hand. For an app where logging speed is half the value, this turns every entry into a conversion: international users leave not over quality but over the geographic blindness of the defaults.

the only weight is ounces, not grams, but litres are available for solid foods

measurements are in ounces or cups by default - what is a cup of celery or carrots

Just give a weight for heaven's sake!!!!

The catalog is stuffed with packaged goods but fails on whole foods

The database overflows with processed and brand-name items, but a plain carrot or some greens can't be found — exactly the audience that cooks from whole foods and needs honest keto tracking most. The barcode scanner, the headline hook, is useless on unpackaged food, so the most "clean-eating" users hit manual entry and leave.

it is loaded with thousands of processed packaged and name brand foods but I can't find many simple produce items

this app is impossible if you cook your own meals from whole foods

Scanning does not work and very limited database of food products!

Under the hood it's a wrapper over the website, not a native app — and the speed shows it

The app essentially renders their website: javascript hangs, the loading screen drags, search lags, and building a single meal takes longer than cooking it. This architectural choice explains the whole scatter of "slow to open" complaints with one root cause — the product isn't native, and for a tracker valued for low-friction quick entry, that's a systemic ceiling on quality.

It's just a stripped down browser that displays their website were all the magic happens

Their javascript frequently hangs causing a restart of the app

It takes longer to build a meal in the app than it takes to prepare an actual one!

The missing Android widget is a quiet retention leak among loyal payers

A tracker's core value is instant entry, yet Android has no home-screen widget while iOS does and reportedly once did. This isn't a whim: users have asked for years and say plainly it's why they'll stop paying for premium. A quiet pain among the most valuable cohort — long-term active payers for whom every extra daily tap costs the subscription.

no widgets means less usability for quick entry

A year later and still no widgets for android

This alone will garuntee I dont keep paying for premium

The whole nicheNutrition & calorie tracking: what to build and where rivals fall shortSee the niche breakdown