pXRay is a powerful toolkit for on-screen layouts and design.


The Dimension tool uses computer vision algorithms to instantly measure anything on your screen.


Ruler enables you to quickly measure and align on screen elements. Clicking on the scale creates quick reference guidelines


Color Loupe displays the color that is currently under your mouse pointer.


Crosshairs follow your mouse around the screen showing you the current coordinates

What’s New

Version 1.3(4)

• Adds ability to nudge ruler 1px with arrow keys
• Adds ability to nudge ruler 10px with shift-arrow keys

Thank you tylermilner for the suggestion

Ratings and Reviews

4.5 out of 5
2 Ratings

2 Ratings

GGS2525 ,

Indispensable tool for UI dev at a great price

This app is great for mapping UI requirements to storyboards during iOS / OSX development, and for checking those requirements when running on the simulator. You get a lot of great features with this tool for a very reasonable price!

_FitzOfRage ,

Can't live without

This app is a must-have utility for UI developers. In my case, it comes in handy translating designs into functioning web pages. The developer is very responsive and the price is so much better than a certain similar tool that shall not be named. Keep up the good work, Chris.

tylermilner ,

Pretty good

I mainly use this for the Ruler functionality to measure the spacing between UI elements when doing app development.

One feature that would be very helpful would be the ability to “nudge” the ruler around the screen using the arrow keys on the keyboard (and then shift + arrow key moves it 10 pixels in that direction). I’ll definitely re-evaluate my rating if this feature is ever added. The competitor app has it so I was disappointed when I bought this and found out that I couldn’t do this basic task.

Still, for the price, this app is a great alternative to it’s main competitor.

Developer Response ,

This feature has been added. Thanks for the suggestion.

Also, I love reviews here. But also note I welcome enhancement and support requests to I can be much more responsive through that support address.

App Privacy

The developer, Chris Wilson, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

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