Comparison

FLEX Stronger vs FlexPro Grip

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

FLEX Stronger

This app revolutionizes weight training by syncing with a sensor to provide real-time performance feedback. Track, manage, and review your training like elite athletes, with automated workouts and group training options. It offers detailed metrics, video recording with data overlay, and a community feature for sharing and downloading workouts.

Highlights
  • Real-time performance feedback
  • Velocity-based training (VBT)
  • Automated workouts
  • Group training for up to three people
  • Video recording with synced data
  • 1RM prediction
  • Workout creation and sharing
Features
Read full description

Revolutionise the way you train and prepare in the weights room! The FLEX Stronger app syncs to a FLEX barbell sensor to deliver real-time feedback straight to your device. Track, manage and review training performance just like elite and professional athletes right across the globe, through the Major Leagues, UFC, Premier League and Olympic institutes. Developed by the team at GymAware, FLEX packages everything we learned from delivering gold standard products to the pro ranks into the only VBT system developed specifically for individual use. The smartest system on the market, FLEX automates your entire training experience. Select an exercise. Load some weight. Lift. Completely wireless. No calibration, adjustments or exercise creation required. Perfect for individual athletes, remote coaches and personal trainers. *Performance Metrics & Targets* Precise and immediate feedback on Mean and Peak Velocity, Mean and Peak Power, Distance, Height, Eccentrics, Position and live bar path tracing. Set targets on key performance metrics to benchmark effort across your session. *Group Training* Add other lifters into your session for group training with up to three people. Complete regular training, pre-programmed workouts or even the 1RM prediction with your group. Training partners who complete sessions with you can collect and store their data in their own profiles once the session is done. Training partners can be added or removed from sessions at any time. *Video Mode* Switch to video mode and record your set with synced data overlaid on the saved file. Send to friends, coaches or share online. Handsfree start and stop. Set your device up and lift. Your video will start, stop and crop to capture the set you just completed. *Automated Workouts* Complete workouts that step you through the entire program, from exercise and weight changes to targets and rest times. *Create, Share and Download Workouts* Create custom workouts directly in the app. Let FLEX run you through your new program, or share them via our Community feature with training partners or clients using FLEX. Looking for inspiration, download sessions from any of your connections in Community and complete them yourself. Set targets based on their results and compete and compare over the same workout. *1RM Predictions* Use the automated 1RM prediction protocol to gauge current strength and readiness levels without an actual 1RM attempt. *Multitasking* There are no limits in the FLEX app. Start regular sessions and add in training partners, or start a pre-programmed workout. Background the app and switch on your favourite tunes. Browse your historical results in the middle of your training sessions. Whatever you need is accessible any time. *Community* Create connections in the FLEX community so you can browse their training history, download sessions (complete with their results), send workouts, train in groups. View session data live as it is uploaded set by set, and interact with fist bumps and comments directly on the platform. *Store and Review* All your data is stored and reviewable in History right in your app. Data is securely backed upon our servers and retrieved on your device at any time.

About

FlexPro Grip

This app works with a specialized device to create customized training programs for baseball pitchers. It measures baseline strength and endurance to improve pitching performance, reduce injury risk, and accelerate recovery. Track your progress with saved workout history.

Highlights
  • Customized training protocols
  • Strength, endurance, and RPD testing
  • Objective data measurements
  • Injury risk reduction
  • Performance enhancement
  • Workout history tracking
Features
Read full description

OVERVIEW: The FlexPro Grip app is to be used along with the FlexPro Grip device. Designed primarily for baseball pitchers, the FlexPro Grip app provides customized training protocols to be performed on the FlexPro Grip device to improve the strength, endurance and explosiveness of the muscles and tendons from your fingertips through your elbow that most impact pitching performance. There is no guesswork. All data measurements are objective. The result: reduce the chance of tearing your UCL improve your spin rate increase your pitch movement throw harder enhance your command last longer in games recover faster after you throw accelerate your rehab if you are recovering from a UCL injury / forearm strain HOW APP WORKS: The app first guides you through a Strength, Endurance, and / or Rate of Force Development test to measure your baseline levels. Then, the app prescribes you with customized training protocols that specify the amount of force to apply, hold times, and the number of sets, reps, exercises to perform to help you make rapid gains in both your health and pitching performance. All workouts are saved to your History so you can track your progress at any time. NO MEDICAL ADVICE: The protocols are intended to provide recommendations but do not constitute medical advice. As with any form of sports or physical training, seek professional medical advice prior to initiating use.

Screenshots

FLEX Stronger4 screens
FlexPro Grip3 screens

Verdict

The call

The clearest difference is rating: FLEX Stronger at 4.4 against FlexPro Grip's 4.1. FLEX Stronger also leads on iOS requirement (12.0 vs 15.1). FlexPro Grip's advantage is update cadence (weekly vs monthly) and ratings volume (27 vs 8). On price, review sentiment, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

FLEX Stronger holds the better App Store score, 4.4 against 4.1. Both are backed by a comparable volume of ratings — 8 and 27 respectively. Written reviews point the same way: 71% of FLEX Stronger's written reviews are positive against 67% of FlexPro Grip's.

UpkeepUpdate frequency

FLEX Stronger ships an update monthly, FlexPro Grip weekly. The most recent releases landed on October 4, 2026 and October 12, 2026 respectively.

Scorecard4 real differences · 6 level
FLEX Stronger versus FlexPro Grip: the parameters behind the verdict, then further details
ParameterFLEX StrongerFlexPro Grip
PriceFreeFree
Rating4.4 (8 ratings) — better4.1 (27 ratings)
Positive reviews71.4% of reviews — better66.7% of reviews
Number of ratings827 — better
Update frequencyMonthlyWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better15.1
Further details — not scored
Size83 MB93 MB
Age rating17+4+
DeveloperKinetic PerformanceFlexProGrip

Customer experience

FLEX Stronger

All ratings8 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews7 reviews
Positive71.4%
Neutral14.3%
Negative14.3%

FlexPro Grip

All ratings27 ratings
Positive77.8%
Neutral0.0%
Negative22.2%
Written reviews9 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

FLEX Stronger

No in-app purchases

None

FlexPro Grip

No in-app purchases

Questions

Is FLEX Stronger free?
FLEX Stronger is free to download, with no in-app purchases.
Is FlexPro Grip free?
FlexPro Grip is free to download, with no in-app purchases.
Which has better reviews, FLEX Stronger or FlexPro Grip?
FLEX Stronger is rated higher. FLEX Stronger averages 4.4 out of 5 from 8 ratings, while FlexPro Grip averages 4.1 from 27 ratings.
Do FLEX Stronger or FlexPro Grip have ads?
Neither FLEX Stronger nor FlexPro Grip shows ads.
Which is updated more often, FLEX Stronger or FlexPro Grip?
FLEX Stronger ships an update monthly, and FlexPro Grip weekly. Most recently, FLEX Stronger was updated on October 4, 2026 and FlexPro Grip on October 12, 2026.

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