Compare software

SimpleHIIT vs Interval Timer: catalog facts
SimpleHIIT	Interval Timer
Free Free and open source under the GPL-3.0-or-later licence.	Free Free and open source under the MIT licence.
Android	Android
Animated demonstrations for each exercise Eight exercise categories to choose from	Quick setup of active and rest times Minimal, easy interface
Android only Focused on HIIT rather than general workout logging	Basic feature set Android only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: MIT
Not stated if an account is 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 2, 2026

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