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Diary vs Happy Moments: catalog facts
Diary	Happy Moments
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the GPL-3.0-or-later licence.
Android	Android
Entries saved as plain text files with Markdown Incremental and full search across entries	All entries are stored only on the device Combines photos and notes in one entry
Android only No built-in sync between devices	Very new project with a short track record Android only, with no sync or backup service described
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-or-later
Not stated if an account is needed	No account 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.