# ChironMotion IMU — MeasureWhatMattersinMovement

> MeasureWhatMattersinMovement (iPhone/iPad app by Yi-Fu Chen.)

- Source: https://appshunter.io/ios/app/chironmotion-imu/id6758951844 (this page in markdown: same URL + `.md`)
- Developer: [Yi-Fu Chen](https://appshunter.io/developer/1873701789)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 25 MB
- Languages: English, Japanese, Korean, Chinese
- Released: 2026-03-10
- Data updated: 2026-07-09
- User reviews in markdown: https://appshunter.io/ios/app/chironmotion-imu/id6758951844/reviews.md

## What is ChironMotion IMU?

ChironMotion is a professional-grade motion analysis tool designed for coaches, athletes, and sports scientists. Leveraging advanced iPhone sensors and a proprietary physics engine, it delivers lab-quality jump metrics simply by securing your phone to your waist.

Key Features:

Comprehensive Test Protocols:
Countermovement Jump (CMJ): Measure lower-limb power and monitor neuromuscular fatigue.
Squat Jump (SJ): Assess pure concentric explosive strength.
Drop Jump (DJ): Analyze Reactive Strength Index (RSI) and plyometric performance.
Single Leg Stance (SLS): Evaluate bilateral symmetry and dynamic balance stability.

Precise Biomechanical Metrics:
Instantly obtain Jump Height, Flight Time, RSI, Peak Power, Rate of Force Development (RFD), and Landing Impact.
High-frequency 200Hz sampling captures movement details invisible to the naked eye.

AI-Powered Insights:
Get personalized training advice from three distinct AI personas: Scientific Expert, Enthusiastic Coach, and Toxic Coach.
Go beyond numbers - understand what your data actually means for your training.

Professional Reporting & Export:
PDF Analysis Reports: Generate detailed reports with waveforms and data breakdowns in one tap.
CSV Data Export: Access raw time-series data for further scientific research.
Test Comparison: Overlay two test results to visually track progress or analyze asymmetries.

Built For:
Strength & Conditioning Coaches
Physiotherapists
Athletic Trainers
Professional & Amateur Athletes
Sports Science Researchers

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://chironmotion.vercel.app/#legal

Download ChironMotion today and let data drive your breakthrough.

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro Monthly Plan | $3.99 | per month |
| Pro Yearly Plan | $39.99 | per year |



## Version history (last 4 releases)

### 1.2 — 2026-06-30

Added a complete legal information center with privacy policy, terms of service, and data deletion details, and refined Meta SDK integration and startup behavior for better stability and release readiness.

### 1.1 — 2026-05-13

This update includes jump analysis improvements, faster report export, and stability enhancements.

### 1.0.1 — 2026-03-19

• Fixed subscription loading issue
• Improved stability of in-app purchases
• Minor bug fixes and UI improvements

### 1.0 — 2026-03-10

No release notes.

## More apps by Yi-Fu Chen

- [ChironMotion Capture](https://appshunter.io/ios/app/chironmotion-capture/id6758568428)
- [ChironMotion Vision](https://appshunter.io/ios/app/chironmotion-vision/id6759504031)
- [ChironMotion Load](https://appshunter.io/ios/app/chironmotion-load/id6770306861)

All apps by Yi-Fu Chen: https://appshunter.io/developer/1873701789

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-09.*