# PhysioAI vs Trejn

The clearest difference is in-app purchases: Trejn at none against PhysioAI's 10. Trejn also leads on update cadence (weekly vs fortnightly). PhysioAI's advantage is iOS requirement (12.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. PhysioAI sells 10 in-app purchases, starting at $6.99 per 7 days. Trejn asks for nothing beyond the download.

PhysioAI ships an update fortnightly, Trejn weekly. The most recent releases landed on September 27, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | PhysioAI | Trejn |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Size | 206 MB | 35 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Boonya Kitpitak](https://appshunter.io/developer/1550788895) | [Roman Janovec](https://appshunter.io/developer/6791120098) |

## What reviewers say

### PhysioAI

[App page](https://appshunter.io/ios/app/physioai-posture-therapy/id6756598601)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Physio AI Personal Weekly | $6.99 | per 7 days |
| Starter Weekly | $9.99 | per 7 days |
| Physio AI Personal Monthly | $12.99 | per month |
| Monthly Starter | $22.99 | per month |
| Physio AI Personal Yearly V2 | $44.99 | per year |
| Physio AI Personal Yearly | $49.99 | per year |
| Physio AI Yearly V2 | $79.99 | per year |
| Starter Annual | $89.99 | per year |
| Physio AI Yearly Exclusive V1 | $299.99 | per year |
| Physio AI Pro Yearly Exclusive V1 | $499.99 | per year |


### Trejn

[App page](https://appshunter.io/ios/app/trejn/id6791120096)

**In-app purchases:** none


## Frequently asked questions

### Is PhysioAI free?

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

### Is Trejn free?

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

### Do PhysioAI or Trejn have ads?

Neither PhysioAI nor Trejn shows ads.

### Which is updated more often, PhysioAI or Trejn?

PhysioAI ships an update fortnightly, and Trejn weekly. Most recently, PhysioAI was updated on September 27, 2026 and Trejn 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.*