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Strong vs Fast N Fitness: catalog facts
Strong	Fast N Fitness
Freemium Free accounts, with a paid Strong PRO tier for progress tracking.	Free Free and open source under the BSD-3-Clause licence.
Android, iOS	Android
Simple, fast logging of sets and workouts Available on iOS and Android	Tracks both cardio and strength training Custom machines and exercises
Detailed progress charts require Strong PRO Closed source	Android only No releases published on GitHub
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: BSD-3-Clause
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 September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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