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SimpleHIIT vs Feeel: catalog facts
SimpleHIIT	Feeel
Free Free and open source under the GPL-3.0-or-later licence.	Free Free and open source under the AGPLv3.
Android	Android, iOS
Animated demonstrations for each exercise Eight exercise categories to choose from	Open source under the AGPLv3 Designed around privacy
Android only Focused on HIIT rather than general workout logging	Focused on simple home workouts rather than detailed training plans Small community project
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: AGPL-3.0
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.