RulingScreen makes you rule your screen. A simple, easy-to-use ruler that lets you develop and design your app easier.

You can register a shortcut to show/hide your ruler, pretty easily.

You can also enjoy various features, such as moving ruler to suit your needs, changing the color of the ruler, or show the ruler always on top of the screen.

I originally decided to develop it after I found that it is too painful to measure a window size of various apps on the screen. I wished I got a good ruler to make my OS X app development life more fruitful.

If you feel sympathy for it, you might get to like the app.

Thank you for the support, guys!

What’s New

Version 3.0

Upgraded to High Sierra

Ratings and Reviews

Z.3.B.R.4 ,

ruling screen

plz can u up date this apps its not working on macOS Sierra…plz update your apps…..thnk’s…..

Developer Response ,

Sorry for the inconvenience. You are right that the app was not working on Sierra until recently, since my Mac runs on El Capitan and I could not develop the app on Sierra. However, it has finally been resolved and now the app is working fine. Really sorry for the issue.


Y Generation Entertainment Limited
3.7 MB
Developer Tools
OS X 10.10 or later, 64-bit processor
English, Japanese, Simplified Chinese, Traditional Chinese
Age Rating
Rated 4+
© 2017 Y Generation Entertainment Limited


  • Family Sharing

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

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