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 the top of your rep range on every set and the load goes up next session. A deload week closes every mesocycle, every four hard weeks by default. Between those, when at least half of a muscle's lifts go three sessions running without progress, MuscleBuddy cuts that muscle's sets by 40% for a week and leaves the rest of the program alone; the whole program deloads when three or more muscles stall.
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, and many apps leave you to redo that math yourself. MuscleBuddy compares the average of your last seven weigh-ins with the seven before, and when the trend drifts from your goal it adjusts your calorie target and tells you what changed and why.
Cutting and maintaining are free; reverse dieting, carb cycling and contest prep are Pro phases. You configure each one, and every number shows where it came from.
Logs offline, and your data stays yours
Log workouts in airplane mode and they 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 and you keep all of it.
Frequently asked
- Do I need a coach to use MuscleBuddy?
No. All four modules work fully self-coached: training, nutrition, health and upkeep. 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 and auto-progression; nutrition tracking and macros; the health hub, check-ins and basic stack; medication and appointment tracking; and ranks, leaderboards, challenges and the social feed, plus weigh-ins, charts and offline logging that syncs when you reconnect. Pro ($9.99/mo) adds AI coaching chat; periodization and contest prep; meal planning and the advanced diet phases; and advanced bloodwork 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?
Hevy and Strong are excellent loggers. MuscleBuddy adds nutrition that reacts to your weigh-ins, a health module and coaching in the same app. The MuscleBuddy vs Hevy and vs Strong pages, under "MuscleBuddy vs other apps" in the footer, compare them line by line.
- Can I switch progression methods mid-program?
Yes, per exercise. Switch one lift to RPE and leave the rest on double progression.
Start logging, free forever
No credit card. Logging, progression and macros are free and stay free. Pro adds meal planning, carb cycling, bloodwork tracking and the other advanced phases.