Compare software

Interval Timer vs SimpleHIIT: catalog facts
Interval Timer	SimpleHIIT
Free Free and open source under the MIT licence.	Free Free and open source under the GPL-3.0-or-later licence.
Android	Android
Quick setup of active and rest times Minimal, easy interface	Animated demonstrations for each exercise Eight exercise categories to choose from
Basic feature set Android only	Android only Focused on HIIT rather than general workout logging
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0-or-later
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.