Compare software

Chrono vs QRAlarm: catalog facts
Chrono	QRAlarm
Free Free and open source under the GPL 3.0 or later.	Free Free and open source under the GPL 3.0.
Android	Android
Flexible alarm schedules, including date ranges Wake-up tasks such as math problems before dismissing	Alarm can only be dismissed by scanning a code Works with QR codes and barcodes
Developers describe it as still in development No code changes since January 2025	Android only You need a printed or placed code to scan
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0
No account needed	No account 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.