# Ruler & Digital Caliper vs Digital Ruler Pro

Ruler & Digital Caliper and Digital Ruler Pro are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Ruler & Digital Caliper sells 1 one-off in-app purchase and Digital Ruler Pro sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Ruler & Digital Caliper | Digital Ruler Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | — |
| Size | 6 MB | 6 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Yurii Koshkin](https://appshunter.io/developer/1873601061) | [学友 刘](https://appshunter.io/developer/1895323694) |

## What reviewers say

### Ruler & Digital Caliper

[App page](https://appshunter.io/ios/app/ruler-and-digital-caliper/id6806950163)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $9.99 | one-time |


### Digital Ruler Pro

[App page](https://appshunter.io/ios/app/digital-ruler-pro/id6814484613)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro | $9.99 | one-time |


## Frequently asked questions

### Is Ruler & Digital Caliper free?

Ruler & Digital Caliper is free to download, with in-app purchases available.

### Is Digital Ruler Pro free?

Digital Ruler Pro is free to download, with in-app purchases available.

### Do Ruler & Digital Caliper or Digital Ruler Pro have ads?

Neither Ruler & Digital Caliper nor Digital Ruler Pro 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.*