Ruler is an accurate length measuring tool. By measuring the size of your monitor, you create one screen rulers on the screen that are the same as a real ruler, so that you can measure length without having a real ruler.

* Compatibility
System requirements: iOS 9.0 or newer, iPadOS 13.1 or newer
Compatible devices: iPhone, iPad, iPod touch

* Dark Mode is Ready
System requirements: iOS 13.0 or newer, iPadOS 13.1 or newer

* Screen Rotation (iOS & iPadOS)
iPhone, iPod touch support rotation in two directions
iPad supports rotation in four directions

* iPad Features
Supporting Multiple Windows on iPad
System requirements: iPadOS 13.1 or newer

If you have any questions, comments, or suggestions, please contact us. Your support is our biggest motivation!

What’s New

Version 21.0.1

- Fixed bugs that incorrect display on iPhone SE
- Fixed bugs of Widget

Ratings and Reviews

4.0 out of 5
30 Ratings

30 Ratings

mKohler6 ,

No-Ad Option

This is a fairly simplistic ruler app that suits the needs I have, however, the ads are kind of annoying. This is an app I would pay a reasonable price around (maybe) $0.99 to make the ads go away forever. Otherwise, great app!

Marino3607 ,

You Need To Download This App

This is one of the best rulers on the App Store. Simple to use, great interface, fluid, and the developer(s) listen to your feedback and are on the ball. On one update the app did not work on my iPad. I wrote them and within 48 hours a new update was available and fixed the issue. I have contacted other developers on different apps and nothing. This was amazing. So you have a great app and great people standing behind it. Not a brainer.

hiruko27 ,

Developer please read

The app is great. The only trouble I find is that if you are measuring something, your finger gets in the way when adjusting the grid. You should be able to click and drag from other parts of the screen to prevent this.


Xi An Yixueyiyong Software Technology Co., Ltd.
8 MB

Requires iOS 14.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Arabic, Catalan, Chinese, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese

Age Rating
In-App Purchases
  1. No Ads $0.99
  2. Tip $0.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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