定規(Ruler) vs Life
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
定規(Ruler)
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.
- Accurate measurements
- Millimeter display
- Inch display
- Supports all iPhone sizes
- Simple interface
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シンプルな定規、mmとinch表示で全てのサイズのiPhoneで正確に測れます。カッコいいでしょ You can measure correctly in iPhone with the size of everything by simple ruler, mm and inch indication. It would be cool
Life
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.
- Smartphone as a ruler
- Measure lengths
- Measure distances
- On-screen measurement
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This app turns your smartphone into a ruler.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | 定規(Ruler) | Life |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 3.0 (4 ratings) |
| Positive reviews | 80.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 | 4 — better |
| Update frequency | Every 6 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 3 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Mayumi Kato | Jumpei Adachi |
Customer experience
定規(Ruler)
Life
In-app purchases
定規(Ruler)
No in-app purchases
Life
- 6-Inch Ruler$0.99
- 4-Inch Ruler$0.99
- 8-Inch Ruler$0.99
Show 5 moreShow fewer
- 10-Inch Ruler$0.99
- 30 cm Ruler$0.99
- 20 cm Ruler$0.99
- 12 cm Ruler$0.99
- 15 cm Ruler$0.99
