# Air Ruler vs Calcora

The clearest difference is price: Calcora at Free against Air Ruler's $0.99. Calcora also leads on iOS requirement (13.0 vs 17.6). Air Ruler's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

Calcora is free to download; Air Ruler costs $0.99 up front. Air Ruler sells 3 in-app purchases, starting at $2.99 per month and Calcora sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Air Ruler | Calcora |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Size | 7 MB | 41 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [乐祥 胡](https://appshunter.io/developer/1572365721) | [Miner Tycoon Limited](https://appshunter.io/developer/1791660908) |

## What reviewers say

### 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 |


### Calcora

[App page](https://appshunter.io/ios/app/calcora/id6769693931)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP_month | $0.99 | per month |
| VIP_year | $4.99 | per year |


## Frequently asked questions

### Is Air Ruler free?

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

### Is Calcora free?

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

### Do Air Ruler or Calcora have ads?

Calcora shows ads; Air Ruler 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.*