# ARuler Pro 2026 vs Charcoal Studio

The clearest difference is in-app purchases: ARuler Pro 2026 at none against Charcoal Studio's 1. Charcoal Studio's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. Charcoal Studio sells 1 one-off in-app purchase. ARuler Pro 2026 asks for nothing beyond the download.

## The numbers

| Metric | ARuler Pro 2026 | Charcoal Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 3 days |
| Size | 1 MB | 14 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [应龙 张](https://appshunter.io/developer/1514562080) | [Digital Hole Pvt. Ltd.](https://appshunter.io/developer/917701060) |

## What reviewers say

### ARuler Pro 2026

[App page](https://appshunter.io/ios/app/aruler-pro-2026/id6770253108)

**In-app purchases:** none


### Charcoal Studio

[App page](https://appshunter.io/ios/app/charcoal-studio/id6821034945)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Features | $4.99 | one-time |


## Frequently asked questions

### Is ARuler Pro 2026 free?

ARuler Pro 2026 is free to download, with no in-app purchases.

### Is Charcoal Studio free?

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

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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.*