Best Free Muscle Building App

227+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated June 2026

Looking for free free muscle building app apps? 20 of our 227+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Top Picks for Free Muscle Building App

Fitness App: Gym Workout Plan#1

Fitness App: Gym Workout Plan by FITNESS ONLINE MChJ

Exercise tracker, home routine
Editor's Choice
💪 Health & Fitness
4.8😊(34K ratings)
FreeAdsIn-App Purchases
Fitness App: Gym Workout Plan screenshot 1
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This app offers comprehensive workout plans and diet guidance for various fitness goals, including weight loss, muscle gain, and toning. It features a vast exercise library with 3D animations, a personal workout diary, and the option to connect with certified personal coaches for tailored online training and nutrition plans.

What We Love

  • 👍 Easy to use
  • 🚀 Convenient workouts
  • 🚀 Clear exercise instructions and videos
  • 🚀 Good integration with Apple Watch

Room to Improve

  • 🐛 Workout calendar doesn't adjust when workouts are missed
  • 🐛 Disconnect between phone and watch
  • 🔒 Concerns about sexualized content and predatory behavior
Gymshark Training and Fitness#2

Gymshark Training and Fitness by Gymshark Ltd

Training App
Strong Contender
💪 Health & Fitness
4.9😊(13K ratings)
FreeAds
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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.

What We Love

  • 👍 Easy to navigate and find exercises
  • 👍 Visually pleasing app
  • 👍 Ability to create custom exercises
  • 👍 Variety of pre-made workouts

Room to Improve

  • 🐛 Logging out issues causing data loss
  • 🐛 Glitchy timer and screen freezing
  • 🐛 Inability to edit previous workout data
Fitbod: Gym & Fitness Planner#3

Fitbod: Gym & Fitness Planner by Fitbod Inc.

AI Personal Trainer & Workouts
Worth Considering
💪 Health & Fitness
4.8😊(274K ratings)
FreeAdsIn-App Purchases
#18in Health & Fitness
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This app creates personalized AI-driven workout plans to help you build muscle, gain strength, and lose weight. It adapts to your fitness level and available equipment, offering over 1000 exercises with video guides. Track your progress and get support from trainers.

What We Love

  • 🚀 Great alternative to expensive personal trainer
  • 👍 Customizable workouts
  • 👍 Variety of exercises
  • 👍 Tracks progress and muscle recovery

Room to Improve

  • 🐛 Occasional app crashes and sync issues
  • 🔧 Workout recommendations don't always make sense
  • 🔧 Limited ability to customize workouts

More Free Muscle Building App apps to explore

4
Muscle Booster Workout Tracker
Muscle Booster Workout Tracker
Muscle Booster Workout Tracker
Calisthenics, Chair, Gym Plans
Free

This app acts as a personal trainer, creating customized workout plans for muscle gain, weight loss, or recovery. It offers a vast library of exercises and challenges for home or gym, adapting to your available equipment and goals.

Personalized workout plans1000+ exercise libraryHome and gym workouts
💪 Health & Fitness
(134K)
free with in-app purchases
5
Muscle Monster Workout Planner
Muscle Monster Workout Planner
Muscle Monster Workout Planner
AI Gym & Home Fitness Exercise
Free

This AI-driven fitness app creates personalized workout plans for fat loss, muscle gain, and overall well-being. It offers over 1200 exercises and 500 workouts, catering to various equipment and fitness levels. Track your progress with detailed reports and integrate with Apple Health for a comprehensive view of your fitness journey.

AI-driven personalized workout plansOver 1200 exercises and 500 workoutsSupports various equipment and bodyweight training
💪 Health & Fitness
(8.9K)
free with in-app purchases
6
LADDER Strength Training Plans
LADDER Strength Training Plans
LADDER Strength Training Plans
Fitness, Workouts, Coaching
Free

This app provides structured, coach-built daily workout plans for strength training, designed for home or gym. It offers in-ear coaching, video demonstrations, and progress tracking to eliminate guesswork and optimize your fitness journey.

Daily structured workout plansExpert coach-built programsIn-ear coaching and video demos
💪 Health & Fitness
(152K)
free with in-app purchases
7
Strong Workout Tracker Gym Log
Strong Workout Tracker Gym Log
Strong Workout Tracker Gym Log
Strength Training Planner
Free

This app helps you track your workouts and progress with an intuitive interface. It offers a wide range of exercises, detailed instructions, and advanced statistics to help you achieve your fitness goals. Easily log your routines, monitor personal records, and stay motivated on your fitness journey.

Intuitive workout loggingComprehensive exercise libraryApple Watch integration
💪 Health & Fitness
(108K)
freemium
8
Gym Exercises & Workouts
Gym Exercises & Workouts
Gym Exercises & Workouts
Create & Log Gym Workouts
Free

Create and log unlimited custom workouts with a vast library of exercises. Track your progress with detailed history and graphs to build strength and confidence. Perfect for beginners and experienced lifters alike.

Create custom workouts140+ predefined workoutsExercise library with instructions
💪 Health & Fitness
(3.6K)
free with in-app purchases
9
Gymverse: Gym Workout Planner
Gymverse: Gym Workout Planner
Gymverse: Gym Workout Planner
Weight Lifting Fitness Trainer
Free

This AI-powered fitness trainer creates personalized, multi-week workout plans that adapt to your progress and goals. It offers expert video guidance for each exercise, tracks your progress visually, and provides motivational insights. Enjoy tailored workouts that avoid disliked or injured areas, with options for strength training, cardio, and more.

AI-generated personalized workout plansAdaptive training based on progressExpert video exercise guidance
💪 Health & Fitness
(164K)
free with in-app purchases
10
Fitness AI Gym Workout Planner
Fitness AI Gym Workout Planner
Fitness AI Gym Workout Planner
Personal Trainer: Muscle Coach
Free

This app uses an advanced algorithm to create personalized workout plans for home or gym. It optimizes sets, reps, and weights to help you build muscle, get toned, or lose weight efficiently. Track your progress and achieve your fitness goals with data-driven routines.

Personalized AI workout plansOptimized sets, reps, and weightsHome and gym workout options
💪 Health & Fitness
(56K)
free with in-app purchases
11
Muscle & Motion: Strength
Muscle & Motion: Strength
Muscle & Motion: Strength
Master Exercise Anatomy
Free

Explore exercise anatomy with interactive 3D animations. Understand muscle engagement, biomechanics, and common mistakes to train smarter and reduce injury risk. Access a vast library of exercises and educational content.

Interactive 3D anatomy model3D exercise anatomy libraryMuscle and joint involvement visualization
💪 Health & Fitness
(7.7K)
free with in-app purchases
12
Home Workout - No Equipments
Home Workout - No Equipments
Home Workout - No Equipments
Workout Tracker, Fitness Coach
Free

This app provides personalized fitness plans and a wide variety of bodyweight exercises for users to build muscle, lose weight, or stay fit. It requires no equipment and can be used anywhere, anytime, with features like workout tracking and video guides.

Personalized workout plans500+ varied workoutsSmart workout tracker
💪 Health & Fitness
(115K)
free with in-app purchases
13
ProFit: Workout Planner
ProFit: Workout Planner
ProFit: Workout Planner
Muscle Training in the Gym
Free

This app guides you through personalized workouts to build strength, lose weight, and improve performance. It offers detailed exercise instructions, custom workout creation, and progress tracking with interactive graphs. Access meal plans and training programs designed by professionals.

350+ exercises with detailed descriptionsHigh-quality photo and video guidanceCustomizable workout plans
💪 Health & Fitness
(43K)
free with in-app purchases
14
Workout Planner - Heavy
Workout Planner - Heavy
Workout Planner - Heavy
Home & Gym Workout Planner Log
Free

This app offers AI-driven workout plans personalized to your fitness goals, schedule, and progress. It adapts in real-time to maximize strength, muscle growth, or weight loss with a vast exercise library and advanced tracking.

AI-tailored workoutsProgressive overload calculationExtensive exercise library with tutorials
💪 Health & Fitness
(1.1K)
free with in-app purchases
15
BEASTLY: Build Muscle Fast
BEASTLY: Build Muscle Fast
BEASTLY: Build Muscle Fast
Smarter Workouts. Real Gains.
Free

This app offers a guided approach to building muscle, featuring personalized workout plans, AI-powered meal tracking, and progress monitoring. It aims to eliminate guesswork and optimize training for faster, more efficient gains.

Customized workout plansAI macro meal tracker60-second body assessment
💪 Health & Fitness
(369)
free with in-app purchases
16
Gym Workout Planner - Gym Plan
Gym Workout Planner - Gym Plan
Gym Workout Planner - Gym Plan
Weight Lifting Muscle Tracker
Free

This app helps you plan and track your gym workouts for faster progress. Choose from a variety of workout plans or customize your own, track sets, reps, and weights, and monitor your personal bests to stay motivated.

Workout plan selectionCustomizable routinesProgress tracking
💪 Health & Fitness
(673)
subscription
17
Boostcamp: Workout Programs
Boostcamp: Workout Programs
Boostcamp: Workout Programs
Active Tracker & Planner App
Free

This app offers a vast library of structured strength training and muscle-building programs, including popular routines like nSuns and Reddit PPL. It provides tools for tracking workouts, monitoring progress, and even building custom plans. The app is designed to eliminate guesswork and provide proven methods for achieving fitness goals.

130+ expert-designed programs10,000+ community-shared routinesFull workout logging with RPE/1RM
💪 Health & Fitness
(9.3K)
free with in-app purchases
18
Workouts For Men: Gym & Home
Workouts For Men: Gym & Home
Workouts For Men: Gym & Home
Build Muscles & Lose Weight
Free

This app provides personalized workout routines and meal plans to help users build muscle, lose fat, and stay motivated. It offers clear exercise instructions with videos, health app integration, and expert guidance for achieving fitness goals.

Hundreds of gym and home workoutsClear exercise instructions with videosPersonalized meal plans and recipes
💪 Health & Fitness
(26K)
subscription
19
Push-Up Routines PRO+ Muscle Body-Building Workout
Push-Up Routines PRO+ Muscle Body-Building Workout
Push-Up Routines PRO+ Muscle Body-Building Workout
by App And Away Studios LLP
Free

Master push-up techniques and build upper body strength with guided video workouts and personalized coaching. Achieve your fitness goals, whether beginner or advanced, in just minutes a day.

8 Rock Solid Pushup Workout VideosPre-Set workouts with 3 difficulty settingsPersonal Coach with Voice Instructions
💪 Health & Fitness
(5)
subscription
20
MyFitCoach - Workout Planner
MyFitCoach - Workout Planner
MyFitCoach - Workout Planner
Fitness & Strength Training
Free

This app creates personalized strength training plans based on scientific principles to help you build muscle effectively. It adapts to your schedule, equipment, and fitness level, offering guidance on exercises and tracking your progress.

Personalized workout plansScience-based strength trainingExercise database with instructions
💪 Health & Fitness
(5.6K)
subscription