Flex Timer

In-app purchases
1.59K reviews
Content rating
Everyone
100K+
Downloads
Content rating
Everyone
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About this app

Say hello to the future of interval training timers!

The GymNext Flex Timer is the world's first interval training timer app that also controls a wall mounted LED display. It's great for interval training workouts like CrossFit, HIIT, Bootcamps, Intensity, MMA, boxing, and many others.

While traditional wall-mounted LED timers provide a great, easy to see display, they are plagued by difficult to use remotes that are easily broken or lost. Alternatively, smartphone timer apps provide a much simpler, more powerful approach to control and setup, but the in-app display is difficult to see from around the gym.

Enter the Flex Timer - the best of both worlds! Combining a highly visible LED display that can be seen from all over your gym with the most advanced, easiest to use interval timer app available. You're going to love it!

Check out these great features:
* use the app standalone without an LED display or combine it with our Home or Gym Edition timers and you'll never squint to see the time remaining again
* 11 highly customizable timer modes including Standard, Round, Interval, Tabata, EMOM, Sets with Rest, Stopwatch, Multi-Segment, Shot Clock, Scoreboard and Beep Test to cover virtually any workout you can think of
* save your favorite workouts for instant recall in the future
* go hands-free with Android Gear to control the timer from your wrist
* use Chrome Cast to display the timer on a television screen or monitor
* hook up your bluetooth heart rate monitor and you can track your heart rate as you workout or setup zones to let you know whether your pace is appropriate
* connect to multiple clocks around your gym and simultaneously control all of them or hook up to them individually and run separate classes
* run multiple different timers at the same time
* with bluetooth control, you can now start, stop and pause your timer from acute angles and around corners - no more line of sight restrictions

High Praise for the GymNext Flex Timer:

"This will eventually become the standard for all gyms"
- Garage Gym Reviews

"All our coaches love the clock"
- CrossFit Barrie

"We got the Gym Edition and we love it to death"
- Wolverine Strength & Conditioning

Download the app and try it out for yourself. You won't be disappointed.

You can purchase a GymNext Flex Timer LED display at http://www.gymnext.com or on Amazon.com.

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We love to hear from our users so that we can build the features you want. If you have suggestions on how we can improve the app, please send them to use via support@gymnext.com. We will be releasing new updates all the time to improve the functionality and add new features.
Interval training timer for CrossFit, HIIT, Bootcamp, MMA, Boxing, and Circuits
Updated on
Sep 18, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
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  • No data collected
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Ratings and reviews

1.55K reviews
Haley Kampfer
September 12, 2026
I have used this app for years and years and loved it until the latest update. Now it is busier and harder to use, and when I minimize the app to change music and come back, for some reason it changes intervals or backtracks in the workout, essentially negating its usefulness as a timer. Please please go back, or at least give us the option to. Nobody needs generative AI for a workout timer app, and I doubt anyone asked for it. It was so much better before!
2 people found this review helpful
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Mehrdad
July 18, 2026
very good app. been using it for years. I do yoga and breathing,each kriya has a different duration ,and I can use the "Interval" to have separate time setting for each. so I don't bother about counting in my mind. I sit rest assured and follow the timer, which gives me heads up and announces shifts. not sure if it has, but I wish it had a text to speech service which I could feed my instructions in it and hear them rather than just hearing "GO " and "Rest". that's all it has GO and REST.
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Conrado Cortez
January 11, 2025
Works great for me. Very flexible. If I don't find what I want in a preset, a lot of times, I can find it in another preset. The one thing that would be really great to see if it could voice out the interval name. I have a separate app that I use for stretching. It will read the Name of the interval. Eg. Prepare for Bridges. Prepare for swimmers.
2 people found this review helpful
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What’s new

Flex Timer 6.1 is one of our biggest updates yet!

• Generative AI — build timers from text, voice, or a photo
• New & custom themes — brand colors for light and dark mode
• Your own voice — record countdown and warning prompts
• Custom cues — audio or on-screen text at key moments
• Round/interval names — know what’s next as cues, titles, or both
• Workout details & QR sharing — capture and share workouts instantly