Ruler Pro

Ruler Pro

100 - 500 downloads

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Photo Ruler Pro is designed to accurately measure the size of any object by taking a picture of it. You can also measure objects in existing pictures by simply choosing one from a gallery. With its simple user-friendly design Photo Ruler Pro allows you to measure things just as conveniently and precisely as with a traditional ruler or tape measure.

Please download the free version or watch the youtube video first so that you understand how to use the app.

How to use:

Firstly, please ensure that the object you wish to measure and the object of known length (Base Item) are in the same picture. There is a predefined list of Base Items, including standard debit/credit cards, coins, etc. Select the one you have. Alternatively, if you do not have any of these objects handy, you can add your own Base Item.

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


It is advised to use the Base Item which is closest in size to the object you wish to measure. Given that you have accurately aligned markers, you will receive a measurement that is as precise as when using a traditional ruler or tape measure.

Keywords: ruler measure photo picture length width distance

Tags: photo ruler.

Recently changed in this version

Improved interface
Double tap to call Arrow Settings

Comments and ratings for Ruler Pro
  • (69 stars)

    by Efra Silveyr on 08/04/2014

    To difficult to use very complicated