Simple Muscle

AI-native workout tracker

Only for iPhone

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

iPhone

AI-native workout tracking. Log sets, run your rest timer, and connect ChatGPT or Claude to plan, edit, and analyze your training. Simple Muscle is an AI-native workout tracker built for between sets and for the AI chat you already use. Plan a workout once, then log each set quickly with big controls for reps, weight, or time. Swipe between exercises, add extra sets, and keep rest moving with a timer that can follow the workout to the Lock Screen and Dynamic Island. The core tracker is free and works offline. You can create workouts, browse the exercise library, review session history, check weekly volume, use charts, adjust kg/lb and rest settings, and finish a full workout without an account. If you sign in, optional sync can back up and restore your training data across devices. With the optional AI Connection subscription, Simple Muscle can connect to ChatGPT, Claude, or other MCP-compatible assistants so an assistant you authorize can plan, edit, and analyze workouts using your training history. Features: - Workout templates and custom workout creation - Active workout mode with set progress - Reps, weight, and duration tracking - Rest timer with pause and skip - Exercise library with filters, instructions, videos, and common mistakes - History, weekly summary, session detail, and progress charts - Kg/lb and week-start preferences - Lock screen Live Activity and rest notifications - Optional account sync and AI Connection Simple Muscle is for personal fitness tracking and is not medical advice. Exercise involves risk. Choose appropriate movements and loads, stop if something feels unsafe, and consult a qualified professional before starting or changing a program if needed. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Ratings & Reviews

  • 1.0
    out of 5
    1 Ratings

The developer, Vladimir Haltakov, 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 Not Collected

    The developer does not collect any data from this app.

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

    Accessibility

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

    Information

    Seller
    • Vladimir Haltakov
    Size
    • 63 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    13+
    In-App Purchases
    Yes
    • Simple Muscle Yearly Plan $49.99
    • Simple Muscle Monthly Plan $4.99
    • Learn More
    Copyright
    • © 2026 Creafex Lab Vladimir Haltakov
  • Developer Website
  • Privacy Policy