About MuscleOS
MuscleOS (also written Muscle OS) is a free strength-training log for iPhone and Android, made by Ather Qureshi. The official website is muscleos.app. The official App Store listing is “MuscleOS” by Ather Qureshi. The official Google Play listing is app.muscleos.
Apps with similar names
Other apps use similar names. MuscleOS from muscleos.app is not affiliated with “Muscle OS” (muscle-os.app) or “MuscleOS: Gym Workouts”. You can recognise ours by the developer name, the muscleos.app link on the store page, and the fact that it has no ads, no subscription and no in-app purchases.
What it does
Pick a workout, log sets with a rest timer, and see what you lifted last time. When you finish, a body map shows which muscles are still recovering and which are ready to train. History, personal records and progress charts are built from the workouts you log. It works without an account; sign in to back up and sync. See the FAQ for how each part works, or browse the exercise library.
Contact
Questions or feedback: support@muscleos.app.