# Overlay One vs Arky

The clearest difference is iOS requirement: Arky at 16.4 against Overlay One's 18.0. On price, ads, in-app purchases and device support 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 | Overlay One | Arky |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 21 MB | 40 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [玉苏甫江 艾西热甫](https://appshunter.io/developer/1085611107) | [Arky](https://appshunter.io/developer/6798485173) |

## What reviewers say

### Overlay One

[App page](https://appshunter.io/ios/app/overlay-one/id6770309850)

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

**In-app purchases:** none


### Arky

[App page](https://appshunter.io/ios/app/arky-your-knowledge-canvas/id6798485171)

**In-app purchases:** none


## Frequently asked questions

### Is Overlay One free?

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

### Is Arky free?

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

### Do Overlay One or Arky have ads?

Neither Overlay One nor Arky shows ads.

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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.*