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Simple Diary vs Daily Diary: catalog facts
Simple Diary	Daily Diary
Free Free and open source under the GPL-3.0 license.	Free Free and open source under GPL-3.0-only.
Linux	Windows, macOS, Linux, Android, iOS
Stores entries as standard Markdown Supports images and dark mode	Starts a fresh entry each day Stores past entries as portable plain text files
Requires Linux with GTK 4 and libadwaita	Past entries are stored in plaintext
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-only
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.