Ruler icon


    by: 14.3K 7.8

    7.8 Users



    Photo Ruler is designed to accurately determine the size of any object by either taking a picture of it or measuring it on the screen. With its simple user-friendly design Photo Ruler allows you to measure things just as conveniently and precisely as with a traditional ruler or tape measure.


    How to use Ruler:

    Photo Ruler:

    Firstly, please ensure that the object you wish to measure and the object of known length (Base Item) are in the same picture. Double tap on screen to call ruler settings. There is a predefined list of Base Items, including Debit/credit card and Quarter. Select the one you have. It is advised to use the Base Item which is closest in size to the object you wish to measure using Ruler.

    Secondly, ensure that the Base Item and the object you wish to measure using Ruler are in the same plane and the ruler camera is (or was) parallel to them. This is necessary to avoid image distortions caused by the ruler camera perspective.

    Align the Blue arrows against the Base item and Green arrows against the object you want to measure. The length of the measured object is shown in the top left corner of the Ruler screen.

    Ordinary ruler:

    Use screen as a traditional ruler. You can measure size of a small object by placing it on the device's screen and adjusting line limiters against the object. The size of the object will be show at the bottom of the screen automatically. If you see that ruler’s scale is visually stretched/ shrunken, you can reset ruler calibration manually. On-screen ruler can be calibrated using different Base Items, including Debit/credit card or coin. Double tap on screen to call settings. Choose between Imperial (inches) and Metric ruler (centimeters).

    Accuracy of Ruler:
    Given that you have accurately aligned markers, you will receive a measurement that is as precise as when using a traditional metric ruler or tape measure.

    Tags: photo ruler , ruler free , grymala линейка на андроид

    Users review

    from 14.300 reviews



    Users comments

    eulick britton

    by eulick britton

    Jul 21, 2017  |  "Awesome"

    Work for me

    Martin Burke

    by Martin Burke

    Jul 19, 2017  |  "Awesome"

    Does "what it says on the box" and surprisingly accurate. I didn't think I would actually use it, how wrong I was.

    Daniel Rodriguez

    by Daniel Rodriguez

    Jul 05, 2017  |  "Awesome"

    Simple and Excellent app. Very accurate. If it had a mode where u put a dimension to test fix sizes, hen it would be a perfect app!!!

    Matthew Samelson

    by Matthew Samelson

    Jul 05, 2017  |  "Good"

    Simple in principle but takes a while to get the hang of it - even after you watch the short YouTube video. Arrows don't drag easily. Zoom doesn't work as expected. Instructions aren't great. That said, once you figure it all out it works well

    Ahmed Alalami

    by Ahmed Alalami

    Jun 26, 2017  |  "Poor"


    Muzamil Jan

    by Muzamil Jan

    Jun 24, 2017  |  "Awesome"

    Very vice apos