A fitness app that adjusts to your real progress
Show up, log your sets, weigh in. MuscleBuddy moves your loads and your macros off the data you already logged, and tells you which sets of yours moved them.
The weight goes up when you earn it, not when a calendar says so
Pick how you want to progress: double progression, linear, RPE, percentage, wave, or let your coach pick for you. Hit your target reps two sessions running and the load goes up. Miss reps three sessions running and MuscleBuddy backs that one exercise off. Not your whole program. Just the lift that stalled.
Nothing here runs on a calendar rule like "deload every fifth week." Your training changes when your training says it should, and every number you get comes from a rule you can read.
Macros that move with your weigh-ins
What you burn changes as your body weight changes. Most apps leave you to redo that math yourself. MuscleBuddy keeps a 7-day rolling average of your weigh-ins, and when the trend drifts away from your goal it adjusts your calorie target and tells you exactly what changed and why.
Cutting, maintaining, reverse dieting, carb cycling, contest prep. Each is a real phase you configure, not a preset you fight. You never have to guess where a number came from.
Offline-first, mobile-first, your data stays yours
Log workouts in airplane mode. Sync when you reconnect. Your workout history, food logs, weigh-ins, and progress photos belong to you: exported anytime, deleted on request, never sold.
When a coaching relationship ends, your coach loses access to your data. You don't lose anything.
Frequently asked
- Do I need a coach to use MuscleBuddy?
- No. Training and nutrition both work fully self-coached. You can add a coach later if you want one, and they get access only to what you allow.
- Will MuscleBuddy work with my existing program?
- Yes. You can log freely without using a generated program, or enter the sets, reps, and RPE from any program you already run. Progression starts working once you have logged a few sessions.
- What does the free tier include?
- Workout logging, program generation, auto-progression on every lift, nutrition tracking and macros, weigh-ins, charts, full offline sync, muscle ranks, the basic bloodwork panel, and the social layer: community, challenges, leaderboards, and achievements. Pro ($9.99/mo) adds the AI coaching chat, meal planning, the advanced diet phases (carb cycling, reverse diet, contest prep), the advanced bloodwork markers, and the compound checker.
- Is nutrition tracking behind the paywall?
- No. Logging food and tracking macros, including the auto-adjustment off your weigh-in trend, is free forever. Pro adds meal planning and the advanced diet phases on top.
- How is this different from Hevy or Strong?
- See our detailed comparisons at /vs/hevy and /vs/strong. Short version: those apps are excellent loggers. MuscleBuddy adds nutrition that reacts to your weigh-ins, and AI check-in analysis, in the same product.
- Can I switch progression methods mid-program?
- Yes, per-exercise. Switch one lift to RPE and leave the rest on double progression. Your call.
Start logging, free forever
No credit card. Logging, progression, and macros are free and stay free. Pro is there when you want the AI coach and the advanced diet phases.