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Day One vs Mini Diarium: catalog facts
Day One	Mini Diarium
Freemium Free to use, with extra features in the paid Gold plan.	Free Free and open source under the MIT licence.
Windows, macOS, Android, iOS, Web, Browser extension	Windows, macOS, Linux
Entries can include photos, video, audio and drawings End-to-end encrypted sync and data export	AES-256-GCM encryption of every entry No network access or telemetry
Some features require the paid Gold plan Closed source	No sync between devices Name change announced, so the branding will shift
Downloadable app, Web application, Browser extension	Downloadable app
Closed source	Open source
License not stated	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.