Stimuli - Hypertrophy Tracker

Muscle Growth Workout Planner

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

The science-backed hypertrophy tracker and pocket AI coach. Log reps and RIR, see the sets that actually grow muscle, and let your program adapt week by week. 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. Terms of Use: https://stimulifitness.com/terms Privacy Policy: https://stimulifitness.com/privacy

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Minor bug fixes.

The developer, Stimuli Fitness Pty Ltd, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Health & Fitness
    • Purchases
    • Contact Info
    • User Content
    • Identifiers
    • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

The developer has not yet indicated which accessibility features this app supports. Learn More

Seller
Stimuli Fitness Pty Ltd
Size
38.5 MB
Category
Health & Fitness
Compatibility
Requires iOS 15.0 or later.
  • iPhone
    Requires iOS 15.0 or later.
  • iPod touch
    Requires iOS 15.0 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
9+
In-App Purchases
Yes
  • Stimuli Pro Annual $79.99
  • Stimuli Pro Monthly $9.99
Copyright
© 2026 Stimuli Fitness Pty Ltd