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Daily Diary vs Simple Diary: catalog facts
Daily Diary	Simple Diary
Free Free and open source under GPL-3.0-only.	Free Free and open source under the GPL-3.0 license.
Windows, macOS, Linux, Android, iOS	Linux
Starts a fresh entry each day Stores past entries as portable plain text files	Stores entries as standard Markdown Supports images and dark mode
Past entries are stored in plaintext	Requires Linux with GTK 4 and libadwaita
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 8, 2026

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