# Clock Tower vs Ruler

The clearest difference is ads: Clock Tower at none against Ruler's shown. Ruler's advantage is iOS requirement (16.4 vs 26.0). On price, 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 | Clock Tower | Ruler |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | — | Every 2 weeks |
| Size | 3 MB | 87 MB |
| Requires iOS | 26.0 | **16.4** |
| Devices | **iPhone, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Morgan Hunt](https://appshunter.io/developer/1539166783) | [MOODLR DESENVOLVIMENTO DIGITAL LTDA](https://appshunter.io/developer/981625898) |

## What reviewers say

### Clock Tower

[App page](https://appshunter.io/ios/app/clock-tower-mm/id6792607662)

**Features:** Vision Pro support

**In-app purchases:** none


### Ruler

[App page](https://appshunter.io/ios/app/ruler-measure-level-and-tools/id6792898860)

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

**In-app purchases:** none


## Frequently asked questions

### Is Clock Tower free?

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

### Is Ruler free?

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

### Do Clock Tower or Ruler have ads?

Ruler shows ads; Clock Tower does not.

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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.*