Best Flex Fitness Training Apps

233+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated July 2026

Flex AI Workout Trainer & Log is the household name in flex fitness training, but it's far from the only option. We track 233+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Flex Fitness Training Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Flex AI Workout Trainer & LogFlex AI Workout Trainer & LogFree4.6★ (2.4K)NoYesAug 2026
2Fitplan®: Gym & Home WorkoutsFitplan®: Gym & Home WorkoutsFree4.8★ (11K)NoYesAug 2026
3Macrofit FitnessMacrofit FitnessFree4.5★ (5.8K)NoYesAug 2026
4HWPO - Training appHWPO - Training appFree4.9★ (3.1K)NoNoAug 2026
5Flex: Workout Tracker & LogFlex: Workout Tracker & LogFree5.0★ (6)YesYesAug 2026
6STNDRD Workout & Fitness PlansSTNDRD Workout & Fitness PlansFree4.6★ (3.7K)NoYesAug 2026
7Motra AI Workout Fitness CoachMotra AI Workout Fitness CoachFree4.7★ (3K)NoYesAug 2026
8STRNGSTRNGFree4.7★ (3.8K)NoYesAug 2026

Top Picks for Flex Fitness Training

Flex AI Workout Trainer & Log#1

Flex AI Workout Trainer & Log by Flex Artificial Intelligence Inc.

Fitness Tracker & Gym Planner
Editor's Choice
💪 Health & Fitness
4.6😊(2.4K ratings)
FreeIn-App Purchases
Flex AI Workout Trainer & Log screenshot 1
Flex AI Workout Trainer & Log screenshot 2
Flex AI Workout Trainer & Log screenshot 3
Flex AI Workout Trainer & Log screenshot 4
Flex AI Workout Trainer & Log screenshot 5
Flex AI Workout Trainer & Log screenshot 6

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

Room to Improve

  • 🐛 Glitches and bugs
  • 💰 Expensive premium subscription
  • 🔒 Limited functionality without premium
Fitplan®: Gym & Home Workouts#2

Fitplan®: Gym & Home Workouts by MVMNT Inc.

#1 Personal Trainer App
Strong Contender
💪 Health & Fitness
4.8😐(11K ratings)
FreeIn-App Purchases
Fitplan®: Gym & Home Workouts screenshot 1
Fitplan®: Gym & Home Workouts screenshot 2
Fitplan®: Gym & Home Workouts screenshot 3
Fitplan®: Gym & Home Workouts screenshot 4
Fitplan®: Gym & Home Workouts screenshot 5
Fitplan®: Gym & Home Workouts screenshot 6

Access personalized workout plans from elite trainers, whether you're at home or in the gym. Track your progress, get step-by-step video guidance, and join a supportive community to achieve your fitness goals.

What We Love

  • 🚀 Great variety of workouts
  • 👍 Easy to follow workouts
  • 👍 Keeps you motivated
  • 👍 Helpful instructional videos

Room to Improve

  • 🐛 App crashes and freezes
  • 🐛 Bugs with saving workouts and progress
  • 🐛 Videos not loading properly
Macrofit Fitness#3

Macrofit Fitness by MacroFit Inc

The Fitness App
Worth Considering
💪 Health & Fitness
4.5😐(5.8K ratings)
FreeIn-App Purchases
Macrofit Fitness screenshot 1
Macrofit Fitness screenshot 2
Macrofit Fitness screenshot 3
Macrofit Fitness screenshot 4
Macrofit Fitness screenshot 5

Access diverse fitness and sport-specific training programs led by professional athletes and trainers. Includes curated nutrition options, macro tracking, and workout logging to help you achieve your fitness goals.

What We Love

  • 🚀 Great content and programming
  • 👍 Clear and intuitive interface
  • 🤸‍♂️ Effective and challenging workouts
  • 🎯 Structured programs with progression

Room to Improve

  • 🐛 Buggy app with frequent crashes and freezes
  • 🔍 Difficult to navigate and find workouts
  • 🔇 Lack of audio/music during workouts

More Flex Fitness Training apps to explore

4
HWPO - Training app
HWPO - Training app
HWPO - Training app
Fitness Training Programs
Free

Access a variety of fitness programs designed for different lifestyles and goals, inspired by a 5x CrossFit Games Champion. Track progress, view coaching videos, and engage with a supportive community. Programs cater to all skill levels, from quick gym sessions to elite competition training.

Variety of fitness programsPersonalized progress trackingReal-time leaderboard
💪 Health & Fitness
(3.1K)
free
5
Flex: Workout Tracker & Log
Flex: Workout Tracker & Log
Flex: Workout Tracker & Log
Track Lifts · PRs · AI Coach
Free

This app logs every workout set, tracks personal records, and generates personalized fitness plans. It also offers nutrition tracking, progress insights, and an AI coach for guidance. Stay motivated with streaks and badges, and share your progress with others.

AI-generated workout plansSet-by-set tracking with rest timerSuperset support
💪 Health & Fitness
(6)
freemium
6
STNDRD Workout & Fitness Plans
STNDRD Workout & Fitness Plans
STNDRD Workout & Fitness Plans
Strength Training Programs
Free

This app provides structured bodybuilding workout programs designed by a champion. It helps users track progress, log lifts, and incorporate advanced training techniques. Nutrition tracking and community support are also included to foster consistency and muscle growth.

Follow champion-designed bodybuilding programsTrack sets, reps, weight, and restLog lifts and monitor strength progress
💪 Health & Fitness
(3.7K)
free with in-app purchases
7
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
8
STRNG
STRNG
STRNG
Top rated fitness training app
Free

This fitness app offers personalized workout plans and nutrition guidance from influential fitness experts. It provides a comprehensive exercise library, on-demand classes, and a supportive community to help users achieve their health and physique goals.

Personalized workout plansComprehensive exercise libraryOn-demand fitness classes
💪 Health & Fitness
(3.8K)
free with in-app purchases
9
TrainHeroic: Strength Training
TrainHeroic: Strength Training
TrainHeroic: Strength Training
Gym Tracker, Workout Log Plans
Free

This app helps users track gym workouts, plan training sessions, and monitor progress. It offers exercise demo videos, coaching points, and features to celebrate achievements like personal records and total volume lifted.

Workout tracker and logWorkout planner and libraryExercise demo videos
💪 Health & Fitness
(1.8K)
free with in-app purchases
10
Splits Training, Do the Splits
Splits Training, Do the Splits
Splits Training, Do the Splits
30 Day Splits Challenge
Free

Achieve full splits with guided, step-by-step training designed for all levels. This app offers a 30-day challenge combining static and dynamic stretches to improve flexibility, balance, and prevent injuries. Customize your routine and track progress with daily 10-minute sessions.

Splits training for all levelsStep-by-step directions30-day splits challenge
💪 Health & Fitness
(3.7K)
subscription
11
MTNTOUGH Fitness & Resilience
MTNTOUGH Fitness & Resilience
MTNTOUGH Fitness & Resilience
Hunting / Tactical Training
Free

This app provides functional fitness and resilience training designed for athletes and hunters. It offers daily workouts, mental toughness programs, and expert coaching to build physical and mental strength for demanding activities and everyday life.

Functional fitness workoutsMental toughness trainingDaily workout programs
💪 Health & Fitness
(3.3K)
subscription
12
Flex Fitness Jungle Gym
Flex Fitness Jungle Gym
Flex Fitness Jungle Gym
by PushPress, Inc.
Free
💪 Health & Fitness
(0)
13
Workout Timer Custom Intervals
Workout Timer Custom Intervals
Workout Timer Custom Intervals
Fitness, Circuit, AMRAP, EMOM
Free

This app offers customizable interval timers for various training styles like HIIT, Tabata, and Crossfit. Track your progress, enjoy background music, and switch between light and dark modes to enhance your fitness routine.

Customizable interval timersSupports HIIT, Tabata, WOD, Crossfit, EMOM, AMRAPHistorical workout tracking
💪 Health & Fitness
(137)
free with in-app purchases
14
Caliber: Strength Training
Caliber: Strength Training
Caliber: Strength Training
Workout Planner & Tracker
Free

This app offers science-based strength training, including workout planning, tracking, and exercise tutorials. It supports individual training, group workouts, and offers optional upgrades for personalized plans, advanced features, and one-on-one coaching.

Unlimited workout creation and tracking600+ exercise tutorials with videosWorkout groups for training with friends
💪 Health & Fitness
(5.8K)
free with in-app purchases
15
123 Flex: Stretching Workouts
123 Flex: Stretching Workouts
123 Flex: Stretching Workouts
Flexibility fitness routines
Free

This app provides personalized stretching and flexibility routines based on your fitness goals and physical condition. It features AI-driven program generation, progress tracking, and visual demonstrations to guide your workouts.

Personalized AI workout plansProgress tracking and reassessments3D animated stretch demonstrations
💪 Health & Fitness
(2)
freemium
16
FLEX Fitness Coaching For PTs
FLEX Fitness Coaching For PTs
FLEX Fitness Coaching For PTs
Personal Training App
Free

This comprehensive platform empowers fitness professionals to manage clients, create personalized training plans, and streamline business operations. It offers customizable branding, automated reporting, and advanced analytics to enhance client engagement and boost business growth.

Client management and progress trackingPersonalized workout and training plan creationIntegrated scheduling and booking
💪 Health & Fitness
(0)
free
17
Stretching Mobility: STRETCHIT
Stretching Mobility: STRETCHIT
Stretching Mobility: STRETCHIT
Stretch, Flexibility, Splits
Free

This app offers guided flexibility and mobility training to improve athletic performance, reduce pain, and increase range of motion. It provides personalized recommendations, curated programs, and challenges to help users build a consistent stretching habit and achieve their fitness goals.

Flexibility training for splits and backbendsMobility exercises for athletic performancePersonalized training recommendations
💪 Health & Fitness
(15K)
free with in-app purchases
18
Weight Lifting Tracker: WeFLEX
Weight Lifting Tracker: WeFLEX
Weight Lifting Tracker: WeFLEX
Fitness AI Weightlifting Coach
Free

This app acts as an AI-powered personal trainer and workout planner. It generates customized routines, tracks progress, and offers social features to keep users motivated. Whether you aim to lose weight, build muscle, or improve overall fitness, it adapts to your goals and experience level.

AI-powered workout generatorCustomizable workout plansSmart tracking of sets, reps, and calories
💪 Health & Fitness
(136)
freemium
19
GymNext Flex Timer
GymNext Flex Timer
GymNext Flex Timer
Bluetooth Interval Timer
Free

This app offers advanced interval training timing with customizable modes and the ability to control an external LED display. It integrates with wearables and heart rate monitors for a comprehensive workout experience.

Control external LED displaysMultiple customizable timer modes (Tabata, EMOM, etc.)Save and recall favorite workouts
💪 Health & Fitness
(2.1K)
free
20
BlazePod
BlazePod
BlazePod
Flash Reflex Training
Free

This app controls smart training pods to provide visual cues for athletic training. It helps improve speed, agility, and reaction times through customizable drills and real-time progress tracking. Users can choose from pre-set activities or create their own to push their limits.

Flash reflex training systemVisual cue and prompt generationCustomizable activity creation
💪 Health & Fitness
(230)
free with in-app purchases

FAQ about Flex Fitness Training

What are the best flex fitness training apps for iPhone?
Flex AI Workout Trainer & Log tops our flex fitness training apps ranking as of July 2026, with a 4.6-star average from 2.4K App Store ratings, and it's free to download.
Yes — 20 of the top flex fitness training apps we rank are free to download, including Flex AI Workout Trainer & Log and Fitplan®: Gym & Home Workouts.
Flex AI Workout Trainer & Log has no ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 233+ flex fitness training apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
This app acts as an AI personal trainer for weightlifters. It provides personalized workout plans, real-time feedback on exercise form using computer vision, and adaptive progression based on sports science principles. It also includes features to track progress, stay motivated, and connect with a community.
Key features include an AI coach that generates personalized workouts, patented real-time form feedback for exercises like squats and deadlifts, adaptive progression and deloading, strength curve tracking, visual progress graphs, and integration with Apple Watch. It also offers gamified elements like leaderboards and streaks.