# 定規(Ruler) vs Life

The clearest difference is rating: 定規(Ruler) at 5.0 against Life's 3.0. 定規(Ruler) also leads on in-app purchases (none vs 8) and iOS requirement (15.6 vs 18.0). Life's advantage is update cadence (fortnightly vs every 6 months) and review sentiment (100% vs 80%). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Life sells 8 one-off in-app purchases. 定規(Ruler) asks for nothing beyond the download.

定規(Ruler) holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews complicate that: 80% of 定規(Ruler)'s written reviews are positive against 100% of Life's, so the app with the better star average is not the one people write more warmly about.

定規(Ruler) ships an update every 6 months, Life fortnightly. The most recent releases landed on June 1, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | 定規(Ruler) | Life |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ruler/id1166028258/reviews)** | [3.0 (4 ratings)](https://appshunter.io/ios/app/life-size-ruler/id6503698542/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 5 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mayumi Kato](https://appshunter.io/developer/705832872) | [Jumpei Adachi](https://appshunter.io/developer/1516414955) |

## 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


### Life

[App page](https://appshunter.io/ios/app/life-size-ruler/id6503698542)

Transform your smartphone into a precise measuring tool. This utility app allows you to measure lengths and distances directly on your device's screen. Ideal for quick estimations and practical applications.

**Highlights:** Smartphone as a ruler, Measure lengths, Measure distances, On-screen measurement

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 6-Inch Ruler | $0.99 | one-time |
| 4-Inch Ruler | $0.99 | one-time |
| 8-Inch Ruler | $0.99 | one-time |
| 10-Inch Ruler | $0.99 | one-time |
| 30 cm Ruler | $0.99 | one-time |
| 20 cm Ruler | $0.99 | one-time |
| 12 cm Ruler | $0.99 | one-time |
| 15 cm Ruler | $0.99 | one-time |


## Frequently asked questions

### Is 定規(Ruler) free?

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

### Is Life free?

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

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

定規(Ruler) is rated higher. 定規(Ruler) averages 5.0 out of 5 from 2 ratings, while Life averages 3.0 from 4 ratings.

### Do 定規(Ruler) or Life have ads?

Neither 定規(Ruler) nor Life shows ads.

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

定規(Ruler) ships an update every 6 months, and Life fortnightly. Most recently, 定規(Ruler) was updated on June 1, 2026 and Life on September 24, 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.*