# 3motionAI Pro vs Eigen Running

The clearest difference is update cadence: 3motionAI Pro at every 3 weeks against Eigen Running's every 5 months. 3motionAI Pro also leads on iOS requirement (15 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

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

3motionAI Pro ships an update every 3 weeks, Eigen Running every 5 months. The most recent releases landed on September 19, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 3motionAI Pro | Eigen Running |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/3motionai-pro/id6474274059/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | Free | — |
| Size | 143 MB | 70 MB |
| Requires iOS | **15** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [3MotionAI Inc.](https://appshunter.io/developer/1554912010) | [Eigen Running GmbH](https://appshunter.io/developer/1833177524) |

## What reviewers say

### 3motionAI Pro

[App page](https://appshunter.io/ios/app/3motionai-pro/id6474274059)

Analyze human motion with advanced biomechanics technology using just your smartphone. Get real-time insights into range of motion and functional movement with easy-to-understand data visualizations and summary reports.

**Highlights:** Real-time motion tracking, Range of motion analysis, Functional movement scoring, Smartphone-only operation, Data visualizations, Summary reports, Science-driven insights

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

**In-app purchases:** none


### Eigen Running

[App page](https://appshunter.io/ios/app/eigen-running/id6751028383)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 3motionAI Pro free?

3motionAI Pro is free to download, with no in-app purchases.

### Is Eigen Running free?

Eigen Running is free to download, with no in-app purchases.

### Do 3motionAI Pro or Eigen Running have ads?

Neither 3motionAI Pro nor Eigen Running shows ads.

### Which is updated more often, 3motionAI Pro or Eigen Running?

3motionAI Pro ships an update every 3 weeks, and Eigen Running every 5 months. Most recently, 3motionAI Pro was updated on September 19, 2026 and Eigen Running on October 30, 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.*