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

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