# Proteus Motion vs FlexPro Grip

The clearest difference is review sentiment: FlexPro Grip at 67% against Proteus Motion's 0%. FlexPro Grip also leads on rating (4.1 vs 3.0) and update cadence (weekly vs every 6 months). 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.

FlexPro Grip holds the better App Store score, 4.1 against 3.0. That said, the two scores are not equally well evidenced: FlexPro Grip has 26 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of Proteus Motion's written reviews are positive against 67% of FlexPro Grip's.

Proteus Motion ships an update every 6 months, FlexPro Grip weekly. Both last shipped on September 10, 2026.

## The numbers

| Metric | Proteus Motion | FlexPro Grip |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/proteus-motion/id1540100362/reviews) | **[4.1 (26 ratings)](https://appshunter.io/ios/app/flexpro-grip/id1630738994/reviews)** |
| Number of ratings | 2 | **26** |
| Positive reviews | 0.0% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | Free | Free |
| Size | 38 MB | 93 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Proteus Motion Inc.](https://appshunter.io/developer/1540100364) | [FlexProGrip](https://appshunter.io/developer/1596885871) |

## What reviewers say

### Proteus Motion

[App page](https://appshunter.io/ios/app/proteus-motion/id1540100362)

This app provides advanced performance training and recovery analytics. It enables low-impact, high-efficiency 3D resistance training. A Proteus System user account is required to use the app.

**Highlights:** Performance training analytics, Recovery analytics, 3D resistance training, High efficiency training, Low-impact training

**Features:** macOS Compatibility

**In-app purchases:** none


### FlexPro Grip

[App page](https://appshunter.io/ios/app/flexpro-grip/id1630738994)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Proteus Motion free?

Proteus Motion 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, Proteus Motion or FlexPro Grip?

FlexPro Grip is rated higher. Proteus Motion averages 3.0 out of 5 from 2 ratings, while FlexPro Grip averages 4.1 from 26 ratings.

### Do Proteus Motion or FlexPro Grip have ads?

Neither Proteus Motion nor FlexPro Grip shows ads.

### Which is updated more often, Proteus Motion or FlexPro Grip?

Proteus Motion ships an update every 6 months, and FlexPro Grip weekly. Most recently, Proteus Motion was updated on September 10, 2026 and FlexPro Grip on September 10, 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.*