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SimpleDay vs Diary: catalog facts
SimpleDay	Diary
Free Free and open source under the GPL-3.0 license.	Free Free and open source under the GPL-3.0 licence.
Android	Android
Markdown entries No account needed	Entries saved as plain text files with Markdown Incremental and full search across entries
Limited to one entry per day by design Young project with a single developer	Android only No built-in sync between devices
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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