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GDF HEMA Timer vs Privacy Friendly Interval Timer: catalog facts
GDF HEMA Timer	Privacy Friendly Interval Timer
Free Free and open source under the GPL-3.0.	Free Free and open source under the GPL-3.0 licence, with no ads.
Android	Android
Large display that is readable during training Configurable rounds	Configurable exercise and rest timers Daily, weekly and monthly training statistics
Small project with a single developer No formal releases on GitHub; installed through F-Droid	Android only Calorie figures are estimates based on MET values
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	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.