Best The Flex Fitness Apps

218+ iOS apps curated and reviewed

4.4 avg rating
20 free apps
Updated May 2026

From beginner-friendly picks to power-user tools, our the flex fitness list covers 218+ iPhone apps updated through May 2026. Compare ratings, prices, and screenshots in one place.

Top Picks for The Flex Fitness

Flex AI Workout Trainer & Log#3

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

Fitness Tracker & Gym Planner
Worth Considering
💪 Health & Fitness
4.7😊(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

More The Flex Fitness apps to explore

4
FLEX Training Collective
FLEX Training Collective
FLEX Training Collective
The WeWork for Fitness Pros
Free
💪 Health & Fitness
(0)
5
The Flex App
The Flex App
The Flex App
Твой фитнес-клуб в кармане
Free
⚽ Sports
(0)
6
JustStretch | Flex & Mobility
JustStretch | Flex & Mobility
JustStretch | Flex & Mobility
Bend Right, Feel Light
Free

This app helps you build a daily stretching habit to improve flexibility, relieve pain, and boost overall well-being. It offers guided routines, custom workout creation, and multimedia instructions for all fitness levels.

Daily stretching routinesCustom workout creationAudio, image, and video guidance
💪 Health & Fitness
(2.3K)
free with in-app purchases
7
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
(3.5K)
subscription
8
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
9
Yoga for Weight Loss & more
Yoga for Weight Loss & more
Yoga for Weight Loss & more
Yoga Workout Classes for Home
Free

Access guided yoga sessions for weight loss, strength, flexibility, and stress relief. Personalized plans and progress tracking help build a consistent practice with world-class teachers. Sessions range from 5 minutes to an hour, fitting any schedule.

Personalized yoga plansGuided yoga sessionsProgress tracking
💪 Health & Fitness
(3.6K)
subscription
10
FLEX Health & Fitness
FLEX Health & Fitness
FLEX Health & Fitness
by Future Flex LLC
Free

Browse and purchase class packs or memberships to access fitness classes. Filter classes by type to find the perfect fit for your routine and manage your reservations with ease to stay committed to your fitness goals.

Purchase class packs and membershipsBrowse class scheduleFilter classes by type
💪 Health & Fitness
(0)
free
11
Fitness Court
Fitness Court
Fitness Court
Free Outdoor Gyms Nationwide
Free

Discover and utilize the world's largest network of free outdoor gyms. This app guides you through effective body-weight exercises with expert coaching and tracks your health stats. Participate in challenges and help your city become healthier.

Find nearby outdoor gymsGuided exercise videosBody-weight circuit training
💪 Health & Fitness
(100)
free
12
Ab Workouts MMA+ FREE Core Strength Abdominal Flex
Ab Workouts MMA+ FREE Core Strength Abdominal Flex
Ab Workouts MMA+ FREE Core Strength Abdominal Flex
by App And Away Studios LLP
Free

Strengthen your core and learn mixed martial arts ground fighting techniques with this app. Developed by a Brazilian Jiu Jitsu expert, it offers unique exercises targeting all abdominal muscles, suitable for any fitness level. Improve fighting skills and build a strong core without special equipment.

24 Distinct MMA Ab Workout Exercises3 Intensity Levels3 Difficulty Levels
💪 Health & Fitness
(9)
free with in-app purchases
13
CoryG Fitness
CoryG Fitness
CoryG Fitness
30 Minute Workouts
Free

Access quick, daily 30-minute workouts designed for busy schedules. Get new routines weekly, monthly programs for strength and leanness, and nutrition guidance. Join a supportive community and track your progress with extensive resources.

Daily 30-minute workoutsNew workouts weeklyMonthly transformation challenges
💪 Health & Fitness
(2.7K)
subscription
14
Jazzercise On Demand
Jazzercise On Demand
Jazzercise On Demand
Home Workout - Dance - Sculpt
Free

This app offers a variety of dance-based fitness classes designed for all levels and time constraints. It combines dance with HIIT, Pilates, and strength training for full-body results, aiming to boost mood and support weight loss goals.

Variety of class lengths (10-50 minutes)Combines dance with HIIT, Pilates, strength trainingSuitable for all fitness levels and ages
💪 Health & Fitness
(2.9K)
free with in-app purchases
15
Indeed Flex - Job Search
Indeed Flex - Job Search
Indeed Flex - Job Search
Your app for temporary work
Free

Discover flexible temporary jobs and hourly work with immediate payment options. Browse available shifts, see earnings upfront, and get paid quickly after completing your work. Available in English and Spanish.

Find flexible jobs and shiftsSee earnings before bookingBook shifts instantly
💼 Business
(6.9K)
free
16
Mōtiv Fitness
Mōtiv Fitness
Mōtiv Fitness
by Dusty and Big Red, LLC
Free

This app allows users to discover and book fitness classes like Barre, Cycle, Rebound, Dance Cardio, and Yoga. Manage your account, make purchases, and find a studio to join a supportive fitness community.

Book fitness classesManage accountMake purchases
💪 Health & Fitness
(668)
ad-supported
17
Barry’s X: Best HIIT Training
Barry’s X: Best HIIT Training
Barry’s X: Best HIIT Training
Strength & Cardio Home Workout
Free

Access a vast library of on-demand fitness classes including cardio, strength training, and stretching, all led by expert instructors. Track your performance with HealthKit integration to gain insights into your workouts and join a supportive digital fitness community.

On-demand fitness contentCardio, Lift, and Stretch workoutsExpert instructor-led classes
💪 Health & Fitness
(2.1K)
subscription
18
HIIT & Tabata: Interval Timer
HIIT & Tabata: Interval Timer
HIIT & Tabata: Interval Timer
Home Workout, Fitness, Gym
Free

This app provides a versatile interval timer for high-intensity interval training (HIIT) and Tabata workouts. It offers professionally designed routines, custom interval creation, and progress tracking, making fitness accessible anywhere.

HIIT and Tabata interval timerProfessionally designed workoutsCustomizable intervals
💪 Health & Fitness
(1.1K)
subscription
19
Flex Fitness Woodland
Flex Fitness Woodland
Flex Fitness Woodland
by flex fitness woodland LLC
Free

Easily book fitness classes, manage your membership, and stay updated on services. Make reservations, join waitlists, and purchase class packages directly from your device.

Book classesManage reservationsJoin waitlists
💪 Health & Fitness
(2)
free
20
Barre Definition
Barre Definition
Barre Definition
Pilates, Barre, Cardio & More
Free

Access a variety of fitness classes including Pilates, Barre, and Cardio workouts. Follow monthly plans or choose specific programs designed for muscle definition, weight loss, and flexibility. Workouts range from 10-45 minutes and can be done offline.

Monthly fitness plansFollow-along workoutsMuscle definition focus
💪 Health & Fitness
(2.7K)
subscription