定規(Ruler) vs cm Ruler, device size measure
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
cm Ruler, device size measure
Transform your device into a versatile ruler for precise measurements. It displays width, height, and tapped positions, allowing you to record and share dimensions. Customize the ruler's appearance with different colors.
- Ruler UI for width and height
- Measure tapped position size
- Record and share measurements
- Customizable ruler color
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This App makes your device as a ruler. - Ruler UI. width, height. - Show Tapped Position Size.(width, height) - Ability to measure and record sizes. - Feature to share the list of recorded sizes - Change Ruler Color.
Screenshots
Verdict
The clearest difference is rating: 定規(Ruler) at 5.0 against cm Ruler, device size measure's 1.0. 定規(Ruler) also leads on ads (none vs shown) and monetization model (free vs ad-supported). cm Ruler, device size measure's advantage is update cadence (every 5 days vs every 6 months). On price, ratings volume, in-app purchases 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. 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 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
定規(Ruler) ships an update every 6 months, cm Ruler, device size measure every 5 days. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.
| Parameter | 定規(Ruler) | cm Ruler, device size measure |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 6 months | Every 5 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 3 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Mayumi Kato | Taisuke Hosokawa |
Customer experience
定規(Ruler)
cm Ruler, device size measure
In-app purchases
定規(Ruler)
No in-app purchases
cm Ruler, device size measure
No in-app purchases
Questions
Is 定規(Ruler) free?
Is cm Ruler, device size measure free?
Which has better reviews, 定規(Ruler) or cm Ruler, device size measure?
Do 定規(Ruler) or cm Ruler, device size measure have ads?
Which is updated more often, 定規(Ruler) or cm Ruler, device size measure?
Other comparisons
