With the diameter app and your iPhone or iPad you can measure the diameter and circumference of real circular shapes in your area. The image of the measurement result can be saved in the photo album and the measurement can be copied to the clipboard.

The App uses Augmented Reality (AR) technology.

How does it work?

Round objects, circles or circle-like geometric shapes such as ellipses and even tree disks with irregular circular shapes are automatically recognized and measured in the app's camera image.

How do I use the App?

Simply move and focus an object in the dotted measuring area of the app. If the object is recognized successfully, the app automatically delivers a measurement result after a short time. It is so easy.


- Your surroundings should be well lit.
- The objects to be measured should ideally not have any reflective surfaces

What’s New

Version 1.2.0

The app has been localized for other languages (Dutch, Korean, Polish, Thai)

Ratings and Reviews

1.0 out of 5
1 Rating

1 Rating

App Privacy

The developer, Peter Kreinz, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

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

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