# ONEkey vs ScreenRuler

The clearest difference is ads: ONEkey at none against ScreenRuler's shown. ONEkey also leads on update cadence (every 6 weeks vs every 7 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

ONEkey ships an update every 6 weeks, ScreenRuler every 7 months. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | ONEkey | ScreenRuler |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 7 months |
| Size | 9 MB | 31 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [at-visions Informationstechnologie GmbH](https://appshunter.io/developer/798664894) | [pilyeong heo](https://appshunter.io/developer/1835315150) |

## What reviewers say

### ONEkey

[App page](https://appshunter.io/ios/app/onekey/id1533946689)

**In-app purchases:** none


### ScreenRuler

[App page](https://appshunter.io/ios/app/screenruler-measure-length/id6761749448)

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

**In-app purchases:** none


## Frequently asked questions

### Is ONEkey free?

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

### Is ScreenRuler free?

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

### Do ONEkey or ScreenRuler have ads?

ScreenRuler shows ads; ONEkey does not.

### Which is updated more often, ONEkey or ScreenRuler?

ONEkey ships an update every 6 weeks, and ScreenRuler every 7 months. Most recently, ONEkey was updated on October 25, 2026 and ScreenRuler on October 28, 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.*