Not a badge app.
A measuring app.
PrimeFeat is a free strength training tracker, on iPhone and on the web.
Who is behind PrimeFeat
PrimeFeat is created and developed by Louis Ferret, an independent developer in France. One founder, no investors: user feedback goes straight to the person writing the code, at contact@primefeat.com. You can also follow the project on Instagram and TikTok.
What we are trying to do
Most fitness apps turn training into a badge collection. PrimeFeat aims for the opposite: making progress measurable. Every logged workout feeds an analysis — volume per muscle, records, load trends, plateau signals — and the app tells you concretely what to adjust next week.
Free, and without ads
The core of the app is free: unlimited workout logging, programs, 90 days of history, records, essential statistics, muscle analysis, leaderboards. An optional Premium subscription funds development and lifts the AI limits (program generation, coach) while unlocking advanced analytics and nutrition; referrals give the referrer a free month for every friend who subscribes.
Your data belongs to you
No ads, no data resale. You can export your data at any time (profile, programs, workouts, sets, records, goals, measurements, cardio, food log, reviews) as JSON, and your training log as CSV. Deleting your account really erases everything, in the database and in storage.
How it works
PrimeFeat is built with React Native / Expo: a native iPhone app on the App Store and an installable web app, sharing the same accounts and data. The backend is a Postgres database (Supabase, hosted in the EU) protected by row-level access control. The app works offline and syncs when you are back online.