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SimpleHIIT vs Privacy Friendly Interval Timer: catalog facts
SimpleHIIT	Privacy Friendly Interval Timer
Free Free and open source under the GPL-3.0-or-later licence.	Free Free and open source under the GPL-3.0 licence, with no ads.
Android	Android
Animated demonstrations for each exercise Eight exercise categories to choose from	Configurable exercise and rest timers Daily, weekly and monthly training statistics
Android only Focused on HIIT rather than general workout logging	Android only Calorie figures are estimates based on MET values
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	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.