# 定規(Ruler) vs Infinite Ruler

定規(Ruler) and Infinite Ruler both sit at 5.0 stars, but that hides the real split: 100% of Infinite Ruler's written reviews are positive against 80% of 定規(Ruler)'s. 定規(Ruler)'s advantage is iOS requirement (15.6 vs 18.2). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for 定規(Ruler) against 5.0 for Infinite Ruler. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews are what separate them: 80% of 定規(Ruler)'s written reviews are positive against 100% of Infinite Ruler's.

定規(Ruler) ships an update every 6 months, Infinite Ruler every 7 months. The most recent releases landed on October 16, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | 定規(Ruler) | Infinite Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/ruler/id1166028258/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/infinite-ruler/id6746876762/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 3 MB | 6 MB |
| Requires iOS | **15.6** | 18.2 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mayumi Kato](https://appshunter.io/developer/705832872) | [Eric Savoie](https://appshunter.io/developer/1695096773) |

## What reviewers say

### 定規(Ruler)

[App page](https://appshunter.io/ios/app/ruler/id1166028258)

A straightforward measuring tool for iPhones, offering accurate measurements in both millimeters and inches. It's designed for ease of use and provides a cool, functional experience for everyday measuring needs.

**Highlights:** Accurate measurements, Millimeter display, Inch display, Supports all iPhone sizes, Simple interface

**In-app purchases:** none


### 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 定規(Ruler) free?

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

### Is Infinite Ruler free?

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

### Which has better reviews, 定規(Ruler) or Infinite Ruler?

定規(Ruler) and Infinite Ruler are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do 定規(Ruler) or Infinite Ruler have ads?

Neither 定規(Ruler) nor Infinite Ruler shows ads.

### Which is updated more often, 定規(Ruler) or Infinite Ruler?

定規(Ruler) ships an update every 6 months, and Infinite Ruler every 7 months. Most recently, 定規(Ruler) was updated on October 16, 2026 and Infinite Ruler on September 21, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*