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To download Rulers from the Mac App Store, you need a Mac with OS X 10.6.6 or later. Learn More.


By omnidea

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Rulers is an app that lets you measure, align and inspect everything on your monitor(s).

Rulers allows you to create as many rulers as you want on the entire screen area like most common graphic editors allow on their working areas only.

The guide lines enable you to measure and position objects with precision. Rulers is incredibly useful in many fields, such as computer graphics, desktop publishing and web design.

Rulers can also be used to select a screen area and take a screenshot that is automatically saved to your desktop or copied to system clipboard.

See it in action here:


• Unlimited rulers creation
• Rulers autosave option
• Grid generator
• Multiple units of measurement support
• Multi monitor support
• Take a screenshot of selected area or whole screen
• Magnifier
• Color picker
• Available in 10 languages (English, Italian, Spanish, German, French, Japanese, Hungarian, Dutch, Russian, Czech)

What's New in Version 2.11.8

More reliable color measurement on latest OS X versions.

Minor enhancements and bug fixes.


Screenshot 1
Screenshot 2
Screenshot 3

Customer Reviews

I am very disappointed; Request Response

I was searching online to find the top mac apps for web developers, and this is one of those which I found. I loved the idea of a ruler which i could use to measure parts of screen resolution. It was an instabuy for me.

Now that I have used the app, I instantly regret it. First of all, there is no cursor when I am clicked inside of the app. I can see a small, almost invisible cross when I am inside of a white box, however otherwise, I can see not cursor. This makes the program almost unusable. Also, many of the functions that the app uses (which are limited as it sits) are hard to access, especially without a cursor.

I either want this problem to be fixed, or I want a refund; preforably the latter.

Wow... Best. Rulers. Ever.

This is exactly what I was looking for! I'm always fiddling with images and needing to measure or preisely align elements, etc. I've sometimes done silly things like opening a blank TextEdit document, just so I had a "straight edge" I could use on-screen.

I suspect the less-than-stellar reviews come from two camps:

(a) People who refuse to take a few minutes to learn how the app works; and
(b) People who refuse to take a few minutes to learn how the app works.

One reviewer goes on and on about how he "can see not cursor." [sic]

You don't need a cursor! This app works differently! After you launch it, you switch to your other app and use *its* cursor! People, learn to READ how something works — instead of just guessing, then giving a 1-star review because you couldn't figure it out. (Unbelievable.)

I get it: We're spoiled, because many apps, these days, are self-explanatory. But this one one works a bit differently (and I'll admit, not exactly intuitively), so you first have to learn the ropes. But once you get the hang of it, it ROCKS… Between the QuickTime movie and the help docs, I was up and running in 10-12 mins. (The horror!)

A few improvements are needed:

• The ability to save ruler settings as files that can be reopened later.
• The ability to select multiple lines (perpendicular or parallel), so they can be shifted in tandem with the arrow keys.
• The option to reverse the readout to "width x height" (instead of "height x width").
• The ability to permanently disable the (annoying) live preview in the dock.

I'm still exploring, so it's possible some of those items are already present. But "right out of the box," this app saved me a good hour of fiddling, the first time I used it.

5 stars. (And I *never* give 5 stars.) :-)


tiny and usefull application ... i love it !

View in Mac App Store
  • $4.99
  • Category: Graphics & Design
  • Updated: May 20, 2013
  • Version: 2.11.8
  • Size: 4.8 MB
  • Languages: English, Chinese, Czech, Dutch, French, German, Hungarian, Italian, Japanese, Russian, Spanish
  • Seller: omnidea srl

Compatibility: OS X 10.6.6 or later

Customer Ratings

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