Flex AI Workout Trainer & Log

Fitness Tracker & Gym Planner

Free · In-App Purchases

Your AI-Powered Gym Tracker & Personal Trainer Smash your fitness goals with Flex – the ultimate AI workout tracker that plans, tracks, and adapts to your progress. No more guesswork! Whether you're lifting weights, building muscle, or losing weight, Flex helps you stay on track and push past plateaus. ============================ Smarter Gym Tracking, Faster Progress - Track every lift & rep automatically – no need for a manual gym logbook. - AI-powered workouts that adjust difficulty based on your performance. - See your gains with real-time charts and streaks. - Sync with Apple Watch for hands-free workout tracking. ============================ Your AI Personal Trainer - Get expert guidance from an AI fitness coach that adapts to you. - Auto-adjusts weight, reps, and sets to maximize strength gains. - Get reminders and real-time coaching on form, rest, and intensity. ============================ Build Muscle, Lose Weight, Stay Motivated - Follow structured workout programs or create your own. - Log every gym session with our lifting log and workout notebook. - Join the Flex community to compare progress and compete with friends. ============================ Free vs. Premium Plans Free Plan: - Access premade workouts - Track workouts & progress - Customize your training plans Flex Premium (CA$12.99/month or CA$79.99/year): - Apple Watch logging - Auto Progression: Adjusts difficulty automatically - Premium training programs & freestyle workouts ============================ Download Flex Now – Your AI Coach Awaits! Smash PRs. Track Gains. Train Smarter. Join thousands of lifters & athletes who trust Flex to track progress and take their gym routine to the next level. Download now and start lifting smarter! ============================ Follow us for tips & updates: Instagram: @flex.ai TikTok: @flex.app Website: flexfitnessapp.com

  • 4.6
    out of 5
    759 Ratings

Bug fixes and enhancements

The developer, Flex Artificial Intelligence Inc., 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
    • Location
    • Contact Info
    • Identifiers
    • Usage Data
    • Diagnostics

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
    • Flex Artificial Intelligence Inc.
  • Size
    • 581.9 MB
  • Category
    • Health & Fitness
  • Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    • Apple Watch
      Requires watchOS 10.0 or later.
  • Languages
    English and 12 more
    • English, Dutch, French, German, Hindi, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Telugu
  • Age Rating
    16+
    • 16+
    • Infrequent
      Contests

      Contains
      Messaging and Chat
      User-Generated Content
      Health or Wellness Topics
  • In-App Purchases
    Yes
    • Premium Yearly Subscription $109.99
    • Premium Subscription Monthly $15.99
    • Premium Plus Yearly $149.99
    • Premium Plus Monthly $22.99
    • Premium Plus Family Monthly $59.99
    • Premium Plus Family Yearly $369.99
  • Copyright
    • © 2025, Flex AI Inc.