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Markor vs Open Notes: catalog facts
Markor	Open Notes
Free Free and open source.	Free Free and open source under GPL-3.0-only.
Android	Android
Edits Markdown, todo.txt and Zim files directly Simple and lightweight	Markdown formatting and image support Reminders and home screen widgets
Android only No built-in sync service	Android only
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0-only
No account needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 8, 2026

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