Compare software

SimpleDayDay One
Free

Free and open source under the GPL-3.0 license.

 Freemium

Free to use, with extra features in the paid Gold plan.

Android Windows, macOS, Android, iOS, Web, Browser extension
  • Markdown entries
  • No account needed
  • Entries can include photos, video, audio and drawings
  • End-to-end encrypted sync and data export
  • Limited to one entry per day by design
  • Young project with a single developer
  • Some features require the paid Gold plan
  • Closed source
Downloadable app Downloadable app, Web application, Browser extension
Open source Closed source
License: GPL-3.0 License not stated
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked October 2, 2026

Checked September 24, 2026

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