# ChironMotion IMU vs TSTE Strong

The clearest difference is update cadence: TSTE Strong at fortnightly against ChironMotion IMU's every 2 months. TSTE Strong also leads on iOS requirement (15.1 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. ChironMotion IMU sells 2 in-app purchases, starting at $3.99 per month and TSTE Strong sells 6 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ChironMotion IMU ships an update every 2 months, TSTE Strong fortnightly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ChironMotion IMU | TSTE Strong |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 21 MB | 121 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Yi-Fu Chen](https://appshunter.io/developer/1873701789) | [IDEASODA](https://appshunter.io/developer/439727517) |

## What reviewers say

### ChironMotion IMU

[App page](https://appshunter.io/ios/app/chironmotion-imu/id6758951844)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly Plan | $3.99 | per month |
| Pro Yearly Plan | $39.99 | per year |


### TSTE Strong

[App page](https://appshunter.io/ios/app/tste-strong/id6774891463)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +5 GB 額外容量 | $1.99 | per month |
| +20 GB 額外容量 | $4.99 | per month |
| 教練入門方案 | $6.99 | per month |
| +50 GB 額外容量 | $9.99 | per month |
| 教練專業方案 | $14.99 | per month |
| +100 GB 額外容量 | $19.99 | per month |


## Frequently asked questions

### Is ChironMotion IMU free?

ChironMotion IMU is free to download, with in-app purchases available.

### Is TSTE Strong free?

TSTE Strong is free to download, with in-app purchases available.

### Do ChironMotion IMU or TSTE Strong have ads?

Neither ChironMotion IMU nor TSTE Strong shows ads.

### Which is updated more often, ChironMotion IMU or TSTE Strong?

ChironMotion IMU ships an update every 2 months, and TSTE Strong fortnightly. Most recently, ChironMotion IMU was updated on October 25, 2026 and TSTE Strong on October 24, 2026.

---

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