# 定規(Ruler)for iPad

> Free digital ruler app for iPad with mm and inch measurements. (iPhone/iPad app by Mayumi Kato.)

- Source: https://appshunter.io/ios/app/rulerfor-ipad/id1148435850 (this page in markdown: same URL + `.md`)
- Developer: [Mayumi Kato](https://appshunter.io/developer/705832872)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 14.1 · 1 MB
- Languages: American English
- Released: 2016-11-09
- Data updated: 2026-06-07
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/rulerfor-ipad/id1148435850/reviews.md

## What is 定規(Ruler)for iPad?

無料の定規アプリです。mmとinch表示で全てのサイズのiPadで正確に測れます。カッコよくて、簡単です。

A free ruler application. You can measure correctly in iPad with the size of everything by mm and inch indication. It's cool and easy.

## Key features

- Digital ruler functionality
- Millimeter measurement
- Inch measurement
- Supports all iPad sizes
- Simple and cool interface

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/rulerfor-ipad/id1148435850/reviews.md

### 2/5 — iPadが操作不能に

*2024-01-16, version 1.3*

DLして使えましたが、しばらくして場面がブラックアウトして操作不能になり強制再起動しました。即アンインストールしました。

### 5/5 — 設定がちょっと少ない

*2023-07-08, version 1.3*

10.9インチのやつ使ってるんだけど、ppi設定とかもないし、うまく言ってるのかわかりづらい

### 5/5 — 使えますが

*2022-01-13, version 1.3*

１０，２のiPadでも使えますが、起点が０からの始まりじゃない様で
チョット不便って言えば不便なので０起点だと良いのにと
心の中で星一つ減らしました。
無料なのにごめんなさい。

### 1/5 — 使えない。

*2018-01-30, version 1.2*

⒑5インチで使っているが、mini用サイズしか表示されず、変更の仕方も不明。

### 5/5 — 普通に使えました。

*2017-01-13, version 1.0*

ちょうど手元に定規がなかったので、とても助かりました。ありがとうございました。

## Frequently asked questions about 定規(Ruler)for iPad

### Is Ruler for iPad free to use?

Yes, Ruler for iPad is a free application. It is supported by advertisements, so you will see ads while using the app.

### What devices does Ruler for iPad support?

Ruler for iPad is specifically designed for and supports all iPad models. It is not available for iPhone or other Apple devices.

### Can I measure in both millimeters and inches with Ruler for iPad?

Yes, the app provides accurate measurements in both millimeters (mm) and inches, catering to different user preferences.

### How accurate is Ruler for iPad?

The app is designed to measure correctly on all iPad sizes, providing precise measurements for your needs.

### When was Ruler for iPad last updated?

The latest version of Ruler for iPad was released on September 12, 2021. The app was originally released on November 9, 2016.

### What is the age rating for Ruler for iPad?

Ruler for iPad has an age rating of 4+, making it suitable for users of all ages.

### Does Ruler for iPad have ads?

Yes, Ruler for iPad contains advertisements. It is an ad-supported free application.

## Version history (last 4 releases)

### 1.3 — 2021-09-12

（１）画面サイズを自動で判別して、正しい寸法線を表示します
Automatically detects the screen size and displays the correct dimension line.

（２）背景と寸法線の色を設定できます
The background and dimension line colors can be set.

（３）SwiftUIで全部書き直ししてます
Everything is rewritten in SwiftUI.

### 1.2 — 2017-06-27

This app has been updated by Apple to display the Apple Watch app icon.

（１）10.5インチディスプレイ対応
 corresponding to 10.5 inch display.

（２）画面の修正
correction of a screen

（３）Swift3で書き直し
it's rewritten in Swift3.

### 1.1 — 2017-01-18

表示の修正
広告システムの変更
Correct display
Advertisement system change

### 1.0 — 2016-11-09

No release notes.

## Apps similar to 定規(Ruler)for iPad

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| --- | --- | --- | --- |
| [Prime Print](https://appshunter.io/ios/app/prime-print/id842479946) | 4.6 (92) | $2.99 | Utilities |
| [BulletsMind - Simple Outliner](https://appshunter.io/ios/app/bulletsmind-simple-outliner/id1629214528) | — | Free | Utilities |
| [TASCAM Sonicview Control](https://appshunter.io/ios/app/tascam-sonicview-control/id1601911419) | — | Free | Utilities |
| [Life-Size Ruler](https://appshunter.io/ios/app/life-size-ruler/id6503698542) | 3.5 (2) | Free | Utilities |
| [PF-L Assist](https://appshunter.io/ios/app/pf-l-assist/id940306488) | — | Free | Utilities |
| [LoopMer](https://appshunter.io/ios/app/loopmer/id6463843999) | 5.0 (5) | Free | Utilities |

## More apps by Mayumi Kato

- [Photo Protractor](https://appshunter.io/ios/app/photo-protractor/id705832869)
- [カメラWeb](https://appshunter.io/ios/app/web/id841622884)
- [レジ金集計for iPhone](https://appshunter.io/ios/app/for-iphone/id845961264)
- [レジ金集計for iPad](https://appshunter.io/ios/app/for-ipad/id877487992)
- [定規(Ruler)](https://appshunter.io/ios/app/ruler/id1166028258)

All apps by Mayumi Kato: https://appshunter.io/developer/705832872

## Related topics

[utilities](https://appshunter.io/ios/topics/utilities) · [measure](https://appshunter.io/ios/topics/measure)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-07.*