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Simple Reminder vs Lembra: catalog facts
Simple Reminder	Lembra
Free Free and open source under GPL-3.0-or-later.	Free Free and open source under GPL-3.0.
Android	Android
Quick Settings tile for adding a reminder Supports typed times and custom dates	Flexible repeat intervals and advance alerts Reminders survive phone restarts
Android only	Android only The interface is in Spanish and English
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	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.