Best apps like Flex - Gym Workout Tracker

10+ similar apps compared and reviewed

4.8 avg rating
10 free apps
Updated September 2026

Looking for something like Flex? We've analyzed 10+ similar apps to help you find the best alternative. Each app is compared by ratings, features, and real user reviews, so you can make the right choice.

Top Alternatives to Flex

Gym log - Strive#1

Gym log - Strive by Artur Fijal

Most generous workout tracker!
Editor's Choice
💪 Health & Fitness
4.9😊(838 ratings)
FreeIn-App Purchases
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This free workout tracker helps you build strength and muscle with unlimited routines, progressive overload tracking, and advanced analytics. It offers offline functionality, personalized dashboards, and seamless data input for a friction-free training experience.

What We Love

  • 🚀 Easy to use
  • 👍 Customizable workouts
  • 🚀 Efficient workout tracking
  • 💡 Helpful progress tracking
  • 🚀 Simple and straightforward
  • 👍 Comprehensive exercise library
  • 🚀 Smooth user experience
  • 👍 Intuitive interface
  • 💡 Useful rest timer
  • 👍 Detailed workout history

Room to Improve

  • 🐛 Occasional bugs or glitches
  • 💡 Desire for more advanced features (e.g., plate calculator, one-arm exercise logging)
  • 💡 Request for ability to delete or reorder exercises in a workout
4.6😊(2.4K ratings)
FreeIn-App Purchases
Flex AI Workout Trainer & Log screenshot 1
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This app uses AI to provide personalized workout plans and real-time form feedback for weightlifters. It tracks progress, offers adaptive progression, and includes motivational features like leaderboards and streaks. It's designed for all experience levels, from beginners to pros.

What We Love

  • 🚀 Detailed workout tracking
  • 👍 Customizable workouts
  • 🔒 Comprehensive exercise library
  • 💡 Helpful progress tracking
  • 👍 Clean and intuitive interface
  • 🚀 Seamless Apple Watch integration

Room to Improve

  • 🐛 Glitches and bugs
  • 💰 Expensive premium subscription
  • 🔒 Limited functionality without premium
  • 🐛 Inconsistent rest timer
  • 🐛 Workout data loss
Gym Day: Workout Routine & Log#3

Gym Day: Workout Routine & Log by Anthony Ng

Gym Tracker & Fitness Journal
Worth Considering
💪 Health & Fitness
4.8😊(1.4K ratings)
FreeIn-App Purchases
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Easily plan, log, and track your weightlifting workouts. Create custom routines or use built-in plans, and visualize your progress with detailed charts. This app simplifies strength training for all levels.

What We Love

  • 🚀 Most complete training app
  • 👍 Easy to use with lots of features
  • 👍 Customizable workouts and plans
  • 👍 Effective training programs
  • 👍 Constantly updated with user feedback
  • 👍 Great value for one-time purchase
  • 👍 Helpful exercise demonstrations
  • 👍 Detailed workout tracking and progress

Room to Improve

  • 🐛 Occasional crashes or bugs
  • 🔋 No Apple Watch integration
  • 🔋 Lack of ability to share workouts with friends
  • 🔋 Limited cardio and bodyweight exercises

More apps like Flex

4
RepCount - Gym Workout Tracker
RepCount - Gym Workout Tracker
RepCount - Gym Workout Tracker
Weight Lifting & Exercise Log
Free

This app helps you track and analyze your strength training workouts. Log unlimited exercises and programs for free, with an optional premium subscription for advanced features like supersets and detailed progress charts.

Workout loggingExercise creationWorkout program creation
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5
Stronglifts 5x5 Workout Plan
Stronglifts 5x5 Workout Plan
Stronglifts 5x5 Workout Plan
Gym Strength Training Program
Free

This app guides you through a proven barbell strength training program with no guesswork. It plans every exercise, set, and weight for you, allowing you to focus on lifting and see consistent progress. Ideal for beginners or those returning to strength training.

Proven 3x/week strength programAutomated progressionGuided workouts with timers
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6
Setgraph: Gym Workout Tracker
Setgraph: Gym Workout Tracker
Setgraph: Gym Workout Tracker
Weight Lifting Strength Log
Free

This app helps users plan and track their weightlifting workouts, focusing on progressive overload and personalized strength training. It offers fast logging, detailed analytics, and customization options to help users achieve their fitness goals.

Fast and simple workout loggingPersonalized workout plansPowerful exercise organization
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7
JEFIT Workout Plan Gym Tracker
JEFIT Workout Plan Gym Tracker
JEFIT Workout Plan Gym Tracker
Training Log Fitness Planner
Free

This app helps you achieve fitness goals with personalized workout plans, detailed exercise instructions, and progress tracking. Log your weight, reps, and sets, and gain insights into your training effectiveness. It supports strength tracking and syncs with Apple Health and smartwatches.

Personalized daily workout plans1,400+ exercises with HD videoWorkout logging and progress tracking
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8
Motra AI Workout Fitness Coach
Motra AI Workout Fitness Coach
Motra AI Workout Fitness Coach
Watch Gym Strength Training
Free

This app automatically tracks your gym strength training exercises using only your Apple Watch's motion. It offers AI-generated personalized workouts based on your recovery and goals, eliminating manual logging.

Automatic exercise tracking with Apple Watch motionTracks over 470 exercise types hands-freeAI-generated personalized workout plans
💪 Health & Fitness
(3K)
free with in-app purchases
9
Gymshark Training and Fitness
Gymshark Training and Fitness
Gymshark Training and Fitness
Training App
Free

This app offers thousands of free workouts and personalized training plans designed by athletes and trainers. Track your progress, discover new routines, and build lasting healthy habits with guided programs and customizable options for all fitness levels.

Thousands of free workoutsPersonalized training plansHabit tracking for 66 days
💪 Health & Fitness
(15K)
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10
Planfit AI Gym Workout Planner
Planfit AI Gym Workout Planner
Planfit AI Gym Workout Planner
Personal Trainer Fitness Plans
Free

This app creates personalized workout plans using AI to help you exercise smarter and achieve your fitness goals. It offers guidance on exercises, tracks your progress, and suggests alternatives when equipment is unavailable. Optimize your training whether you're at home or in the gym.

Personalized AI workout plannerOptimized sets and repsMachine/equipment guide
💪 Health & Fitness
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