# Flex - Gym Workout Tracker — Powerful Gym Workout Tracker > Strength training workout tracker with custom plans and progress monitoring. (iPhone/iPad app by Dino Constantinou.) - Source: https://appshunter.io/ios/app/flex-gym-workout-tracker/id986808754 (this page in markdown: same URL + `.md`) - Developer: [Dino Constantinou](https://appshunter.io/developer/848408117) - Category: Health & Fitness, Sports - Price: Free - Rating: 4.20/5 from 5 App Store ratings · 12 written reviews indexed - Age rating: 4+ - Requires: iOS 14.0 · 5 MB - Languages: American English - Released: 2017-01-10 - Data updated: 2026-06-11 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/flex-gym-workout-tracker/id986808754/reviews.md ## What is Flex? Flex is a simple yet powerful workout tracker that has been designed for anyone who engages in strength training. Effortlessly create workout plans, track workouts, and browse previous workouts all with a simple and intuitive user interface. Features: - Useful dashboard that shows all time statistics, recent workouts, and the next workout in your current workout cycle - Create custom workout plans for any kind of program (such as Starting Strength or StrongLifts 5×5) - Duplicate existing workout plans which make it easy to create similar plans with slight variations - Track reps and weight performed for each exercise during a workout and compare them the last workout - great for pushing yourself. - Automatic and customisable rest timers that are triggered automatically when completing each set - Comprehensive exercise list to choose from when creating workouts - Create custom exercises for your workouts - Choose between metric (KG) and imperial (LB) units for sets - View your complete chronological workout history - Keep track of your exercise progress and personal bests - Automatically sync workouts with Apple Health ## Key features - Workout plan creation - Rep and weight tracking - Rest timers - Exercise progress monitoring - Apple Health sync - Customizable units (KG/LB) ## Recent user reviews (10 of 12) All indexed reviews: https://appshunter.io/ios/app/flex-gym-workout-tracker/id986808754/reviews.md ### 5/5 — So good *2025-03-19, version 1.3.1* I love this app. I have a couple of improvements. Add a comments box for each rep or exercise. And add a easy/medium/hard icon to select. This will help with the next time you do the specific exercise and encourage you to improve. ### 4/5 — A practical no frills app for serious training *2024-11-01* The app is easy to program and well set out for quick recording a workout in the gym if you are not new to lifting. Still needs an export function or better a text printout or CSV file to import into excel. ### 5/5 — Would love a notes feature *2024-02-15, version 1.3.1* I’ve been using this app for over 6 months now and have been loving it. I have no problem with it whatsoever but I’d love if the developer/s could maybe add a notes section that can be used mid workout. It’d allow me to track more than just the weight, sets and reps. For example if a machine has certain settings I’d like to use next time, but won’t remember off the top of my head, I could note it down to see next time. ### 2/5 — Average at best *2022-06-14, version 1.3.1* App has a limited number of exercises for you to choose from but will allow you to create your own exercises. The app is slightly difficult to navigate Timer stops if you lock your phone No buzzer to let you know when the timer is up If you want to do multiple sets of the same exercise the app won’t allow you to save this so that the set number is saved for the next time you do the exercise plan it’s ready for you to go. Timer resets its self to 3mins every time you change exercise instead of 1min which is what I work to Won’t allow you to create supersets!! ### 5/5 — Bug 37 reps * 70kg = -87000kg *2021-08-27* Исправте баг в статистике на 37 повторах на 40 повторах, до 100. ### 1/5 — Crashes *2021-07-03* when editing workout ### 5/5 — A really practical, no-fuss app *2021-06-06, version 1.1.1* It’s a simple app that is easy to use and does exactly what I want it to do (in my case just to track my lifts/PBS) in a practical way with clean UI. Very impressed. ### 2/5 — Freezes all the time after latest update *2017-12-04, version 1.1.1* Used to be one of the best apps. After the latest update it started freezing at least 5 times during my workout. Also, Apple Watch doesn’t receive notifications anymore after the app update. ### 5/5 — Awesome *2017-04-21, version 1.0.1* Very useful app! Big thanks to creators ### 5/5 — Best app for strength-training *2017-04-17* Finally a simple, intuitive, well-designed lifting app to track strength and progress. Highly recommended! ## Frequently asked questions about Flex ### What is Flex? Flex is a workout tracker designed for strength training. It allows users to create custom workout plans, log exercises with reps and weight, and monitor their progress over time. The app also features automatic rest timers and syncs with Apple Health. ### Is Flex free to use? Yes, Flex is completely free to download and use. There are no in-app purchases or advertisements within the application, offering an uninterrupted experience for users. ### What devices does Flex support? Flex is available for iPhone and iPod devices. It is designed to run on these Apple mobile platforms. ### How often is Flex updated? The latest version of Flex is 1.3.1, which was last updated on February 14, 2022. While the app hasn't been updated recently, it remains a functional tool for its intended purpose. ### Can I track different workout programs with Flex? Yes, Flex allows you to create custom workout plans for various programs, including popular ones like Starting Strength or StrongLifts 5x5. You can also duplicate existing plans to make slight variations easily. ### Does Flex track my personal bests? Absolutely. Flex helps you keep track of your exercise progress and personal bests. You can compare your current performance to previous workouts, motivating you to push further. ### What is the age rating for Flex? Flex has an age rating of 4+. This indicates it is suitable for a wide range of users, including younger individuals interested in fitness. ### Does Flex integrate with other health apps? Yes, Flex automatically syncs your workouts with Apple Health. This allows you to consolidate your fitness data in one place. ## Version history (last 5 releases) ### 1.3.1 — 2022-02-14 - Adds the ability to log distance based exercises such as running and cycling, as well duration based exercises such as planks - Fixes performance issues and several bug fixes ### 1.3.0 — 2022-02-12 - Adds the ability to log distance based exercises such as running and cycling, as well duration based exercises such as planks - Fixes performance issues and several bug fixes ### 1.2.0 — 2022-02-08 Updates for iOS 15. ### 1.1.1 — 2017-11-26 This app has been updated by Apple to display the Apple Watch app icon. - Adds the ability to log distance based exercises such as running and cycling, as well duration based exercises such as planks - Fixes performance issues and several bug fixes ### 1.1.0 — 2017-10-30 - Adds the ability to log distance based exercises such as running and cycling, as well duration based exercises such as planks - Fixes performance issues and several bug fixes ## Apps similar to Flex | App | Rating | Price | Category | | --- | --- | --- | --- | | [Stronger - Gym Workout Planner](https://appshunter.io/ios/app/stronger-gym-workout-planner/id1621719397) | 4.8 (15,355) | Free | Health & Fitness | | [Gym Workout Planner - Gym Plan](https://appshunter.io/ios/app/gym-workout-planner-gym-plan/id1041998247) | 4.7 (673) | Free | Health & Fitness | | [Muscle Booster - Workout Plans](https://appshunter.io/ios/app/muscle-booster-workout-plans/id1446447749) | 4.1 (9,941) | Free | Health & Fitness | | [Gains: Weightlifting Tracker](https://appshunter.io/ios/app/gains-weightlifting-tracker/id1019332088) | 4.8 (201) | Free | Health & Fitness | | [HeavySet - Gym Workout Log](https://appshunter.io/ios/app/heavyset-gym-workout-log/id1171500310) | 4.6 (1,253) | Free | Health & Fitness | | [Gym Day: Workout Planner & Log](https://appshunter.io/ios/app/gym-day-workout-planner-and-log/id1409190654) | 4.8 (1,307) | Free | Health & Fitness | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*