Free strength training tracker for iPhone. Build your routines, log every set, and watch yourself get stronger, session after session.
Built for lifters who want serious tracking without the noise.
Generate a structured summary of your workouts and share it with ChatGPT, Claude or Gemini in two taps. Your profile (goal, experience, target frequency, reported pain) is included so the analysis is actually relevant. No API keys, no extra subscription. Your data leaves only when you choose to share it.
The Musku iOS widget puts your workouts one tap away. Pick the medium (4 workouts) or large (8 workouts) size, configure which workouts appear via long-press, and start without even opening the app.
Log your sets in two taps, auto rest timer, fluid transitions. The app stays at your service, never the other way around.
Progression graphs on every exercise, personal records, estimated 1RM trends. You always know where you're heading.
A selection of pre-configured programs to get started, and full freedom to design your own routines from scratch.
Visualize volume distribution per muscle group and fix imbalances before they become a problem.
No Wi-Fi at the gym? No problem. Start, edit and finish your sessions without a connection. Everything syncs the moment you're back online.
Your rest timer ticks down on the lock screen. No need to keep the app open during your set.
Every finished workout is written to Apple Health, contributing to your activity rings. Stored locally on your device.
Leave your phone in the bag. Log sets, control your rest timer, and follow your routine directly from your wrist.
Start free. Go Premium when you're ready.
Yes, the core experience is free with no time limit. A Premium subscription unlocks advanced statistics and access to all our pre-made programs. It's optional and supports the development.
Yes. Your workouts are saved locally and synced automatically when you're back online. You can train at the gym without any data signal.
If you enable the sync in the settings, every finished workout is added to the Apple Health app. The data stays on your device. Nothing is sent to our servers or third parties.
Yes, in one tap from the app settings. Everything is wiped: workouts, statistics, account. Permanent and immediate.
Not yet. Musku is currently iOS only, designed natively for iPhone (Live Activities, Apple Health, etc.). An Android version may come later if there's demand.
Musku is built solo by a French indie developer. No investors, no ad networks, just an app dedicated to your strength training.
Free. No ads. iPhone, iOS 15+.
Download on the App Store