Most trackers treat every set the same. Stimuli is a hypertrophy training app that scores the real muscle-building work in each set you log, tracks how recovered every muscle is, and builds programs that progress with you. Train with intent, and know whether your training is working.

SCORE EVERY SET
Log weight, reps, and RIR (in 0.5 steps) and Stimuli scores the stimulus each set delivers to every muscle it trains, not just the ones in the exercise name. Rows credit your traps. Belt squats spare your lower back. The model knows the difference.

SEE RECOVERY, PER MUSCLE
A full-body muscle figure shows what is fresh, what is fatigued, and what is ready to train again, derived from the work you have actually logged.

PROGRAMS THAT GROW WITH YOU
Generate a program with AI that matches your schedule, equipment, experience, and muscle priorities, or build your own from scratch. Weekly progress keeps your plan honest, and targets update from your logged performance.

KNOW YOUR NUMBERS
Estimated 1RM trends per exercise, weekly volume per muscle, and session summaries show trajectory, not just history. Deload guidance is grounded in a sustained decline in your strength trend, never guesswork.

BUILT FOR THE GYM FLOOR
Fast set logging, rest timers, per-exercise technique cues with illustrations, bodyweight and weighted movements handled properly, kg and lb support, and history synced across your devices. Available in 13 languages.

YOUR DATA, YOURS
Your training history and analytics stay yours to browse even if your subscription ends, and you can delete your account, and everything with it, right from Settings.

STIMULI PRO
Stimuli runs on a Stimuli Pro subscription. Start with a free trial and get the full app: live workout sessions, AI program generation, per-muscle recovery, and all your analytics. Choose monthly or yearly. The subscription auto-renews until cancelled, and you can cancel anytime in your App Store account settings.

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