Muscles is the fitness intelligence platform built for athletes who demand more than just a log. Track workouts, monitor nutrition, and unlock deep performance analytics — all in one place.
Why Muscles
Log every set, rep, and weight with precision. Rest timer, unilateral mode, Live Activity on your Lock Screen, and automatic PR detection.
Track calories, protein, carbs, and fat daily. Monitor your protein streak, scan barcodes, or let AI analyze your meal from a photo.
Six performance KPIs: volume trends, intensity, L/R imbalance, training load, duration, and session ratings with interactive charts.
Log and visualize body weight over time. Starting point markers and change indicators keep the long-term picture in focus.
Set daily notifications for supplements, pre-workout, or anything your routine demands. Custom time, custom message.
Muscles detects and celebrates PRs in real time — mid-workout — keeping momentum and motivation high every session.
Workout Tracking
Log your training with the precision of a coaching staff. Set-by-set weight and rep tracking, built-in rest timer on your Lock Screen, and a Live Activity so you never lose count — even with the phone in your pocket.
Analytics
Stop guessing whether you're improving. Muscles turns every session into actionable intelligence — showing volume trends, intensity patterns, and muscle imbalances across any time range you choose.
Nutrition Tracking
From your morning protein shake to late-night meals, Muscles keeps your nutrition aligned with your goals. A 12-day protein streak shouldn't be broken by forgetting to log lunch.
Join thousands of athletes who train smarter with Muscles.
Free to download. No credit card required.
iOS 17+ · iPhone & iPad · English & Deutsch