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Privacy Friendly Interval Timer vs Exercise Timer: catalog facts
Privacy Friendly Interval Timer	Exercise Timer
Free Free and open source under the GPL-3.0 licence, with no ads.	Free Free and open source under the GPLv3.
Android	Linux
Configurable exercise and rest timers Daily, weekly and monthly training statistics	Saved presets for sets and interval lengths Audible cues before and at each transition
Android only Calorie figures are estimates based on MET values	Timer only, with no workout logging or history Linux desktop only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
No account 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 1, 2026

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