# 定規(Ruler) vs Ruler / Measuring Tape

The clearest difference is rating: 定規(Ruler) at 5.0 against Ruler / Measuring Tape's 4.4. 定規(Ruler) also leads on review sentiment (80% vs 51%). Ruler / Measuring Tape's advantage is ratings volume (219 vs 2) and iOS requirement (13.0 vs 15.6). On price, update cadence, ads and in-app purchases there is nothing between them.

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

定規(Ruler) holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Ruler / Measuring Tape has 219 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 80% of 定規(Ruler)'s written reviews are positive against 51% of Ruler / Measuring Tape's.

定規(Ruler) ships an update every 6 months, Ruler / Measuring Tape every 3 months. The most recent releases landed on June 1, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | 定規(Ruler) | Ruler / Measuring Tape |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ruler/id1166028258/reviews)** | [4.4 (219 ratings)](https://appshunter.io/ios/app/ruler-measuring-tape/id1262452961/reviews) |
| Number of ratings | 2 | **219** |
| Positive reviews | **80.0% of reviews** | 50.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 3 MB | 2 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mayumi Kato](https://appshunter.io/developer/705832872) | [Clafou Ltd](https://appshunter.io/developer/424537553) |

## 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


### Ruler / Measuring Tape

[App page](https://appshunter.io/ios/app/ruler-measuring-tape/id1262452961)

Measure objects using your device's screen, augmented reality, or by printing a ruler. Offers three distinct methods for on-demand measurement without physical tools.

**Highlights:** Measure against screen, Augmented reality measurement, Printable ruler via AirPrint, ARKit integration, No ads or in-app purchases

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy to use
- 📏 Accurate measurements (for some)
- 🆓 Free with no ads
- 💡 AR ruler functionality
- ✨ Clean interface

**What reviewers complain about**

- 🐛 Inaccurate measurements
- 🐛 Doesn't detect surfaces
- 🐛 Slow to analyze
- 🐛 Difficult to use
- 🐛 Not suitable for large objects

**Reported bugs**

- Cannot accurately measure anything
- Force turns off the flashlight
- Shows totally wrong scale on iPhone 15 Pro Max
- cm and inch are in reverse directions
- Ne s’adapte pas au zoom de l’écran

**Requested features**

- Option to change ruler pips (16/1, 8/1)
- Scrolling ruler for longer objects
- Button to turn on flashlight
- Compatibility for iPad Air 2
- Tutorial or instructions


## Frequently asked questions

### Is 定規(Ruler) free?

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

### Is Ruler / Measuring Tape free?

Ruler / Measuring Tape is free to download, with no in-app purchases.

### Which has better reviews, 定規(Ruler) or Ruler / Measuring Tape?

定規(Ruler) is rated higher. 定規(Ruler) averages 5.0 out of 5 from 2 ratings, while Ruler / Measuring Tape averages 4.4 from 219 ratings.

### Do 定規(Ruler) or Ruler / Measuring Tape have ads?

Neither 定規(Ruler) nor Ruler / Measuring Tape shows ads.

### Which is updated more often, 定規(Ruler) or Ruler / Measuring Tape?

定規(Ruler) ships an update every 6 months, and Ruler / Measuring Tape every 3 months. Most recently, 定規(Ruler) was updated on June 1, 2026 and Ruler / Measuring Tape on September 23, 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.*