# FLEX Stronger vs Exsurgo Performance System

The clearest difference is review sentiment: FLEX Stronger at 71% against Exsurgo Performance System's 0%. FLEX Stronger also leads on update cadence (monthly vs every 3 months) and ratings volume (8 vs 1). Exsurgo Performance System's advantage is rating (5.0 vs 4.4). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Exsurgo Performance System holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: FLEX Stronger has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 71% of FLEX Stronger's written reviews are positive against 0% of Exsurgo Performance System's, so the app with the better star average is not the one people write more warmly about.

FLEX Stronger ships an update monthly, Exsurgo Performance System every 3 months. The most recent releases landed on August 6, 2026 and August 26, 2026 respectively.

## The numbers

| Metric | FLEX Stronger | Exsurgo Performance System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (8 ratings)](https://appshunter.io/ios/app/flex-stronger/id1452436164/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/exsurgo-performance-system/id1545024378/reviews)** |
| Number of ratings | **8** | 1 |
| Positive reviews | **71.4% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free | Free |
| Size | 83 MB | 30 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Kinetic Performance](https://appshunter.io/developer/343232407) | [Exsurgo Technologies, LLC](https://appshunter.io/developer/1396586023) |

## What reviewers say

### FLEX Stronger

[App page](https://appshunter.io/ios/app/flex-stronger/id1452436164)

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:** macOS Compatibility

**In-app purchases:** none


### Exsurgo Performance System

[App page](https://appshunter.io/ios/app/exsurgo-performance-system/id1545024378)

This application connects with Exsurgo Technologies devices to capture athletic performance data. Analyze your results to create effective training programs for improved athletic abilities, injury recovery, or establishing a starting baseline.

**Highlights:** Capture data from gFlight, gSprint, and gStrength devices, Analyze athletic performance metrics, Build custom training programs, Track progress for injury recovery, Establish training baselines

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is FLEX Stronger free?

FLEX Stronger is free to download, with no in-app purchases.

### Is Exsurgo Performance System free?

Exsurgo Performance System is free to download, with no in-app purchases.

### Which has better reviews, FLEX Stronger or Exsurgo Performance System?

Exsurgo Performance System is rated higher. FLEX Stronger averages 4.4 out of 5 from 8 ratings, while Exsurgo Performance System averages 5.0 from 1 ratings.

### Do FLEX Stronger or Exsurgo Performance System have ads?

Neither FLEX Stronger nor Exsurgo Performance System shows ads.

### Which is updated more often, FLEX Stronger or Exsurgo Performance System?

FLEX Stronger ships an update monthly, and Exsurgo Performance System every 3 months. Most recently, FLEX Stronger was updated on August 6, 2026 and Exsurgo Performance System on August 26, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*