# Dr.pen vs True Movement Studio US

The clearest difference is iOS requirement: Dr.pen at 12.0 against True Movement Studio US's 16.6. On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Dr.pen | True Movement Studio US |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | — | Every 2 months |
| Size | 82 MB | 97 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | — | **iPhone** |
| Age rating | 17+ | 4+ |
| Developer | [贵华 陈](https://appshunter.io/developer/1745110391) | [True Movement](https://appshunter.io/developer/1480347558) |

## What reviewers say

### Dr.pen

[App page](https://appshunter.io/ios/app/drpen/id6511230599)

**In-app purchases:** none


### True Movement Studio US

[App page](https://appshunter.io/ios/app/true-movement-studio-us/id6758385491)

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

**In-app purchases:** none


## Frequently asked questions

### Is Dr.pen free?

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

### Is True Movement Studio US free?

True Movement Studio US is free to download, with no in-app purchases.

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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.*