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By Idan Sheetrit

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FREE for limited time!

- Number 1 FREE app by Mashable! -

Simply measure length in cm or inches using your iPhone or iPod-touch.

The most comfortable and easy to use ruler for your iPhone, See screenshots or just download and try it for FREE!

#1 - Ruler app on more countries than we can count with more than 2 MILLION happy users worldwide!

Just put your finger on the screen and slide your iPhone. It's as simple as that!

You can select the ruler type by tapping once on the screen.

Now you can take a ruler wherever you go! You must give it a try!

We've added more rulers types, So, You can upgrade and add the one you like to i-Ruler (inside the app).

You can watch this demonstration video:

You should give it a try and join more than 2,000,000 happy users worldwide.

Important: iPhone and iPod-touch only, measurements with iPad is not supported (you'll get inaccurate results). We're working on iPad version and it would be available soon.

If you have problems with the application please use the application support otherwise we cannot contact you to understand the problem.

Customer Review:

"Best free ruler app around!"

Love It
"Absolutely love that app! The best ruler I know!"

"Should be built-in with the iPhone!!!"

What's New in Version 4.0.2

Fix issues with iPhone 6 Plus. We are very sorry for that.

If you like the app, please rate it on the App Store every time an update comes out!
As always, your iTunes ratings and reviews keep the updates coming!


Your feedback is super valuable for us. Please send us more feedback and feature suggestions. We promise to reply every request.

iPhone Screenshot

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Customer Reviews

Very accurate

Not only does the application seem promising, but what I did was that I took several tools to measure the app's ruler and, after running some tests, concluded that the imperial system is just right. I have taken another tool (my only toolโ€”12 inchesโ€”which can also measure in centimeters) to measure the in-app ruler in centimeters, and, having observed my tests, I can confirm that the metric system is also accurate.

One of my only two complaints however is that, for every half of a half of an inch, the marker is about the same length as one-quarter-markers and three-quarter-markers (both of which are for every half an inch), and my suggestion for them is that they be slightly lengthened but obviously still shorter than half-inch-markers. My second and last complaint is that the free ruler is only 8 5/16 inches long, which for me is a little weird because a popular length for imperial rulers is a dozen inches (a.k.a. one foot). I have not seen a ruler with such a length, so, yeah, it is just weird and unusual.

My conclusion: with just minor flaws, this app is great, and it works better when we have a sheet of paper or some other material so that we could mark our points. ๐ŸŒŸ๐ŸŒŸ๐ŸŒŸ๐ŸŒŸ๐ŸŒŸ

Great tool

This is an nifty and accurate tool to have on your phone especially when you are building and designing a house. It's helped me multiple times when I needed to take measurements but did not have a tape measure on me. Now if only my phone will project laser beams so that I could measure a large space from one spot.

Great Support! Funny, too!

Without exposing how dumb I was, I wrote to the support team with questions I had. Not only did they help me without (very deserved) criticism, they responded in a way that made me laugh. Obviously, this is a user focused group of folks! Tool works as it says! Very helpful!

View In iTunes
  • Free
  • Category: Utilities
  • Updated:
  • Version: 4.0.2
  • Size: 24.7 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

  1. Three feet Ruler$1.99
  2. Two feet Ruler$1.99
  3. One meter Ruler$1.99
  4. Half meter Ruler$0.99
  5. 3ft Designed Ruler$2.99
  6. 1m Designed Ruler$2.99