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 21.5

- Update the third party SDK to adapt iOS 14.5;
- Fixed other known issues.

Ratings and Reviews

3.5 out of 5
51 Ratings

51 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!

dearwarsaw ,

Stylish And Practical

I really like how clean, functional, and well-thought out design this app has. I downloaded a bunch of ruler apps before deciding on keeping this one. Even paid to remove the ads.

As it’s been mentioned, please divide inches in 1/8s or 1/16s. I understand the reason why you are keeping it in 1/10s, it’s the only way to make the crosshair numbers make sense, as well as the way numbers are put into the horizontal/vertical boxes. Please, designers, figure it out.

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.

App Privacy

The developer, Listy, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Identifiers
  • Usage Data
  • Diagnostics
  • Other Data

Data Linked to You

The following data may be collected and linked to your identity:

  • Identifiers
  • Usage Data
  • Diagnostics
  • Other Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

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

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