Lift Intelligence
The FLEX device attaches to your barbell and measures the chosen exercise performance, velocity and power. The FLEX App intelligently receives and records movement metrics from the FLEX device, Workout details are securely synchronised with the backend Flex Server, allowing you, and your chosen friends to share and compare performance improvements over time.

Individual Athletes
FLEX is for those who are ready to take their training to the next level. FLEX allows individual athletes to train better, avoid injury and track their progress with accuracy. Using the same technologies and training methods as elite athletes, individuals are given real time metrics including Power, Velocity, Height and Dip on each and every lift.
With the rise in popularity of Velocity Based Training, individual athletes are able to take advantage of the FLEX as a way to pre-determine their training load. Velocity Based Training uses velocity as a biometric feedback tool to gauge weight training on a day to day basis. Basically, velocity output helps dictate how much load you should be adding or removing on a particular set, or if you should move on and try a new exercise altogether.
Take the guesswork out of your sessions and train with FLEX; with Lift Intelligence.

Remote Coaching
Keeping clients motivated and accurately tracking their progress are two common issues associated with online or remote training. FLEX removes the guesswork as a coach is able to track the progress of their client, regardless of how far apart they may be.
Utilising technology as part of a system is vital to the success of online coaching, and as FLEX is able to provide accurate data to individuals in the weight room, online coaches are now able to make decisions and provide informed programming.

Create Community
With the world demanding connectivity on every level, FLEX delivers community to its users. Create networks of likeminded individuals who will keep you accountable through your training.
For those Powerlifters and CrossFitters who are ready to step up their game, the best equipment is a necessity. With laser guided focus on barbell sessions, FLEX can be the tool which fills the hole in performance monitoring. Tracking progress in the weights room with accuracy is undoubtably beneficial to those in the community, especially those who are competing.

What’s New

Version 1.11.1

A long list of brand new features that add enormous versatility to the FLEX App!

*Workout Builder*

You can now create your own custom Workouts directly in the FLEX App. Our powerful Workout Builder is packed full of options.
Add custom BLOCKS to segment Workouts (like warmups, working sets and cool downs).
Quickly add exercises and duplicate or remove sets.
Create supersets and circuits by linking exercises.
Manage rounds and add inter-round rest breaks.
Bulk update reps, load and Velocity targets for exercises with blocks.
Drag and drop functionality means you can instantly switch your program order around.
Prescribe load using kg/lbs or %1RM
New 1RM library allows you to log 1RMs for any exercise.

You can also 'save' completed training sessions and build them out with the new Workout Builder.

*Sharing Workouts*

Share your custom Workouts with your athletes or friends in the FLEX Community. They'll be able to download the Workout direct from their Community feed and store it in their own library.

*Download Workouts*

Looking for inspiration? Browse your Community feed and download new workouts into your own library.
When launching downloaded workouts you can set targets based on your friend's results.
Make sure you leave a message in Community to let them know you've taken on the challenge.

*SKIPPING SETS * and your updated Progress Screen

If following a Workout in FLEX, you have an updated progress screen with a sexy progress bar, completion indications against each set and the ability to SKIP sets.

*Resume Feature*

Has something gone wrong?
Our new resume feature lets you return to regular training sessions, Workouts and 1RM predictions if your session is cut short for any reason.

Tap "help" in the Favorites section to learn how to get the most out of this mega update.
We trust that you enjoy!

Ratings and Reviews

4.7 out of 5
7 Ratings

7 Ratings

Hudsy86 ,

Happy buyer

The unit shipped quick enough and after a bit of playing around I figured out how I like to use the app best. My workouts are far better compared to not having Flex. Can’t imagine going back to training without it.


Great app, great device

Great training feedback and helps get the most out of sessions. So easy to use. Even has a social function so I my friends can see my sessions and comment.

spuddy0009000 ,

App crashes frequently

I’m sick of the app crashing in the middle of a workout. I lose my stats/progress and have to restart the workout. Sort the app out ASAP!
Consider including an option to continue favourite workouts that have not been completed.

Developer Response ,

Hi, we have just released a new app update which fixes this issue. Testing and developing can be hard so if you ever find bugs or have any feature ideas, please reach out to us at

App Privacy

The developer, Kinetic Performance, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer's privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Location
  • Contact Info
  • User Content

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

You May Also Like