# Ruler Professional vs Infinite Ruler

The clearest difference is review sentiment: Infinite Ruler at 100% against Ruler Professional's 57%. Infinite Ruler also leads on rating (5.0 vs 3.3) and in-app purchases (none vs 1). Ruler Professional's advantage is device support (3 vs 1) and iOS requirement (10.0 vs 18.2). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Ruler Professional sells 1 one-off in-app purchase. Infinite Ruler asks for nothing beyond the download.

Infinite Ruler holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 57% of Ruler Professional's written reviews are positive against 100% of Infinite Ruler's.

Ruler Professional ships an update every 6 months, Infinite Ruler every 7 months. The most recent releases landed on October 29, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Ruler Professional | Infinite Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (3 ratings)](https://appshunter.io/ios/app/ruler-professional/id527471088/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/infinite-ruler/id6746876762/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | 57.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 7 MB | 6 MB |
| Requires iOS | **10.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [KBIC International Ltd](https://appshunter.io/developer/505094094) | [Eric Savoie](https://appshunter.io/developer/1695096773) |

## What reviewers say

### Ruler Professional

[App page](https://appshunter.io/ios/app/ruler-professional/id527471088)

Transform your iOS device into a versatile measuring tool. Accurately measure lengths in both centimeters and inches using on-screen markers. Ideal for quick, on-the-go measurements.

**Highlights:** Device as a ruler, Metric and imperial units, Adjustable measurement markers, Real-time distance display

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad Removal | $0.99 | one-time |


### Infinite Ruler

[App page](https://appshunter.io/ios/app/infinite-ruler/id6746876762)

Measure objects with precision using a digital ruler that extends beyond your screen. Choose fractional inch or centimeter units and calibrate for accuracy. Ideal for quick measurements when a physical tool isn't available.

**Highlights:** Fractional inch or centimeter measurement, Adjustable precision (1/8, 1/16, 1/32 inch), Extendable ruler beyond screen length, Customizable zero point, Live distance markers, On-device calibration

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

**In-app purchases:** none


## Frequently asked questions

### Is Ruler Professional free?

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

### Is Infinite Ruler free?

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

### Which has better reviews, Ruler Professional or Infinite Ruler?

Infinite Ruler is rated higher. Ruler Professional averages 3.3 out of 5 from 3 ratings, while Infinite Ruler averages 5.0 from 2 ratings.

### Do Ruler Professional or Infinite Ruler have ads?

Neither Ruler Professional nor Infinite Ruler shows ads.

### Which is updated more often, Ruler Professional or Infinite Ruler?

Ruler Professional ships an update every 6 months, and Infinite Ruler every 7 months. Most recently, Ruler Professional was updated on October 29, 2026 and Infinite Ruler on October 8, 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.*