Compare software

Flexify vs Strong: catalog facts
Flexify	Strong
Free Free and open source.	Freemium Free accounts, with a paid Strong PRO tier for progress tracking.
Android	Android, iOS
Works fully offline Progress graphs and rest timers	Simple, fast logging of sets and workouts Available on iOS and Android
No generated training plans or coaching Small project maintained mainly by one developer	Detailed progress charts require Strong PRO Closed source
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
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 1, 2026	Official website Full listing and sources Checked September 23, 2026

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