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Spix vs Fast N Fitness: catalog facts
Spix	Fast N Fitness
Free Free and open source under the AGPL-3.0, with no subscription.	Free Free and open source under the BSD-3-Clause licence.
Android	Android
Automatic rep counting with the camera GPS run tracking with maps	Tracks both cardio and strength training Custom machines and exercises
Android only Small project by a single developer with no dedicated product page	Android only No releases published on GitHub
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	License: BSD-3-Clause
No account needed	Not stated if an account is needed
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.