# Proteus Motion vs Dirtbag Development

The clearest difference is rating: Dirtbag Development at 5.0 against Proteus Motion's 3.0. Dirtbag Development also leads on update cadence (every 6 weeks vs every 6 months) and device support (4 vs 2). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

Dirtbag Development holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Proteus Motion ships an update every 6 months, Dirtbag Development every 6 weeks. The most recent releases landed on September 10, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Proteus Motion | Dirtbag Development |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/proteus-motion/id1540100362/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dirtbag-development/id6739147428/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 38 MB | 172 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Proteus Motion Inc.](https://appshunter.io/developer/1540100364) | [Dirtbag Development LLC](https://appshunter.io/developer/1783860259) |

## 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


### Dirtbag Development

[App page](https://appshunter.io/ios/app/dirtbag-development/id6739147428)

Access personalized workout programs and track your fitness journey. Monitor workouts, nutrition, habits, and measurements with coach support. Achieve your health goals with progress tracking and milestone rewards.

**Highlights:** Access training plans, Track workouts and meals, Follow exercise videos, Monitor daily habits, Set and track goals, Message your coach, Track body measurements

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Proteus Motion free?

Proteus Motion is free to download, with no in-app purchases.

### Is Dirtbag Development free?

Dirtbag Development is free to download, with no in-app purchases.

### Which has better reviews, Proteus Motion or Dirtbag Development?

Dirtbag Development is rated higher. Proteus Motion averages 3.0 out of 5 from 2 ratings, while Dirtbag Development averages 5.0 from 1 ratings.

### Do Proteus Motion or Dirtbag Development have ads?

Neither Proteus Motion nor Dirtbag Development shows ads.

### Which is updated more often, Proteus Motion or Dirtbag Development?

Proteus Motion ships an update every 6 months, and Dirtbag Development every 6 weeks. Most recently, Proteus Motion was updated on September 10, 2026 and Dirtbag Development on September 6, 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.*