# Achromator vs Air Ruler

The clearest difference is price: Achromator at Free against Air Ruler's $0.99. Achromator also leads on in-app purchases (none vs 3). On ads, device support and iOS requirement there is nothing between them.

Achromator is free to download; Air Ruler costs $0.99 up front. Air Ruler sells 3 in-app purchases, starting at $2.99 per month. Achromator asks for nothing beyond the download.

## The numbers

| Metric | Achromator | Air Ruler |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | — |
| Size | 1 MB | 7 MB |
| Requires iOS | 17.6 | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [HANS-JURGEN GRAF GROTE](https://appshunter.io/developer/1787606413) | [乐祥 胡](https://appshunter.io/developer/1572365721) |

## What reviewers say

### Achromator

[App page](https://appshunter.io/ios/app/achromator/id6739949388)

**In-app purchases:** none


### Air Ruler

[App page](https://appshunter.io/ios/app/air-ruler-objects-measure/id6763083628)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ruler Premium - 30days | $2.99 | per month |
| Ruler premium - yearly | $8.99 | per year |
| Ruler Premium - lifetime | $29.99 | one-time |


## Frequently asked questions

### Is Achromator free?

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

### Is Air Ruler free?

Air Ruler costs $0.99, and also offers in-app purchases.

### Do Achromator or Air Ruler have ads?

Neither Achromator nor Air Ruler 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.*