Day One is the most mature journal in its category: multiple journals, search across years of entries, reliable export, rich formatting, and photos. The product is not declining technically but in trust. Aggressive monetization of AI features in the Gold tier and persistent upgrade prompts frustrate loyal paying users.
評価点：Search across the entire entry history with attached photos going back 8-plus years works flawlessly and turns the journal into a personal knowledge base.
不満点：Constant pop-ups pushing the Gold upgrade annoy even Silver subscribers and destroy the feeling of a private space.
向いている人：Serious journalers and people who have kept a diary for years and value reliable export
Bear remains one of the best note-taking apps in the Apple ecosystem: fast, beautiful, with powerful tagging and clean markdown. As a diary it only works if users build the structure themselves, and data occasionally gets lost during updates.
評価点：Eight years of stable performance with a consistent experience across all Apple devices and quick sync without extra setup.
不満点：The absence of a traditional folder hierarchy and mandatory tag-based organization puts off users who think linearly.
向いている人：Those who write notes and keep a journal in markdown and want a beautiful tool in the Apple ecosystem
A reliable photo diary with excellent search and a monthly calendar view, with stable sync. The main product flaw: photos can only be inserted at the end of an entry, not inline.
評価点：A calendar cover with photo thumbnails for the month gives an instant visual overview of your life.
不満点：Photos cannot be placed at an arbitrary point in the text; they always appear as a separate block.
向いている人：Visual chroniclers who want to remember life through photographs
A functional cross-platform diary with Markdown support and iCloud sync that works reliably for most people. Sync conflicts when writing from multiple devices simultaneously, and onboarding does a poor job explaining the basics.
評価点：Markdown formatting and stable sync between iPhone and Mac without any extra configuration.
不満点：When writing on two devices back to back, sync conflicts and entries get mixed up.
向いている人：Fans of clean text journaling in the Apple ecosystem
Journey offers a rich set of formats: text, photos, voice, templates, and cloud sync. It suits those who want a life archive across all devices. Weak spots are navigation that is sometimes unclear and sync that occasionally loses entries.
評価点：Entries are accessible from any device and saved for years, giving the feeling of a genuine personal archive.
不満点：No mood analytics or pattern insights: the app stores your data but does not help you understand it.
向いている人：Those who keep a detailed personal archive with photos and want access everywhere
