# Project i vs ChironMotion Vision

The clearest difference is in-app purchases: Project i at none against ChironMotion Vision's 6. Project i also leads on update cadence (every 4 days vs every 6 weeks) and iOS requirement (13.0 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. ChironMotion Vision sells 6 in-app purchases, starting at $3.99 per month. Project i asks for nothing beyond the download.

Project i ships an update every 4 days, ChironMotion Vision every 6 weeks. The most recent releases landed on October 1, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Project i | ChironMotion Vision |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 6 weeks |
| Size | 247 MB | 40 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [易系统科技有限公司](https://appshunter.io/developer/1407109252) | [Yi-Fu Chen](https://appshunter.io/developer/1873701789) |

## What reviewers say

### Project i

[App page](https://appshunter.io/ios/app/project-i/id6502819946)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### ChironMotion Vision

[App page](https://appshunter.io/ios/app/chironmotion-vision/id6759504031)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cam Monthly | $3.99 | per month |
| Cam+AI Monthly | $4.99 | per month |
| Lidar+AI monthly | $5.99 | per month |
| Cam Yearly | $39.99 | per year |
| Cam+AI Yearly | $49.99 | per year |
| Lidar+AI yearly | $59.99 | per year |


## Frequently asked questions

### Is Project i free?

Project i is free to download, with no in-app purchases.

### Is ChironMotion Vision free?

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

### Do Project i or ChironMotion Vision have ads?

Neither Project i nor ChironMotion Vision shows ads.

### Which is updated more often, Project i or ChironMotion Vision?

Project i ships an update every 4 days, and ChironMotion Vision every 6 weeks. Most recently, Project i was updated on October 1, 2026 and ChironMotion Vision on September 29, 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.*