Simple Muscle

Simple Muscle is an AI-native workout tracker for iPhone. It combines fast set, rep, weight, and duration logging with reusable workout templates, exercise guidance, history, progress charts, rest timers, Live Activities, and lock-screen controls. The core tracker is free and works offline. Optional sync securely backs up training data across devices. AI Connection lets an authorized ChatGPT, Claude, or other MCP-compatible assistant create and update workout plans, review completed sessions, analyze exercise trends, and suggest grounded changes using the athlete’s real training history.

Built for gym-goers, strength trainees, and fitness enthusiasts, Simple Muscle delivers a focused native iOS experience with practical insights and straightforward privacy controls.