# Vision Tracker vs Tai Chi Alien

The clearest difference is in-app purchases: Tai Chi Alien at none against Vision Tracker's 2. Tai Chi Alien also leads on update cadence (daily vs every 8 days) and device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. Vision Tracker sells 2 in-app purchases, starting at $2.99 per month. Tai Chi Alien asks for nothing beyond the download.

Vision Tracker ships an update every 8 days, Tai Chi Alien daily. The most recent releases landed on October 18, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Vision Tracker | Tai Chi Alien |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 8 days | **Daily** |
| Size | 11 MB | 175 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 12+ | 4+ |
| Developer | [跃松 邬](https://appshunter.io/developer/1757347442) | [Mind Body Aware Games LLC](https://appshunter.io/developer/1018615903) |

## What reviewers say

### Vision Tracker

[App page](https://appshunter.io/ios/app/vision-tracker-myopia/id6759781809)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vision Tracker Pro (Monthly) | $2.99 | per month |
| Vision Tracker Pro (Yearly) | $19.99 | per year |


### Tai Chi Alien

[App page](https://appshunter.io/ios/app/tai-chi-alien/id6765859087)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Vision Tracker free?

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

### Is Tai Chi Alien free?

Tai Chi Alien is free to download, with no in-app purchases.

### Do Vision Tracker or Tai Chi Alien have ads?

Neither Vision Tracker nor Tai Chi Alien shows ads.

### Which is updated more often, Vision Tracker or Tai Chi Alien?

Vision Tracker ships an update every 8 days, and Tai Chi Alien daily. Most recently, Vision Tracker was updated on October 18, 2026 and Tai Chi Alien on October 9, 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.*