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Chrono vs Simple Alarm Clock: catalog facts
Chrono	Simple Alarm Clock
Free Free and open source under the GPL 3.0 or later.	Free Free and open source under the Apache-2.0 license.
Android	Android
Flexible alarm schedules, including date ranges Wake-up tasks such as math problems before dismissing	Gradual volume increase and vibration Adjustable snooze controls
Developers describe it as still in development No code changes since January 2025	Android only No dock mode or world clock
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: Apache-2.0
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 8, 2026

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