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Midnight vs Diary: catalog facts
Midnight	Diary
Free Free with no ads or in-app purchases, open source under GPL-3.0.	Free Free and open source under the GPL-3.0 licence.
Android	Android
Quick entry with a deliberately simple interface Tagging to organize entries	Entries saved as plain text files with Markdown Incremental and full search across entries
Small, young project with few contributors Android only	Android only No built-in sync between devices
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	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.