Questions and Answers

Arboreal Tree Height:

1. How do I get the best result?

When you walk away from the tree you should keep your phone in an upright position (not pointing directly at the ground). Walk away approximately the same distance as the height of the tree. It is important that you see the top clearly from the point where you aim at the base and top of the tree.

2. I can´t se the base of the tree because it is concealed.

If you are measuring in a dense forest it could be hard to get a good view at the base of the tree. If you in the beginning marked the tree at breast height you could aim 1.3 meter below the red mark.

3. Is there any difference between different phones?

Arboreal uses the camera and the internal sensors of the phone. New phones have better cameras and works better in low-light conditions. We have got good measurements from all phones we tested. But we got the impression that we got better results when not using the oldest model Iphone 6S that works with Arboreal.

4. What phone do I need?

iOS: The app uses AR-technology that demands a newer device than iPhone 6s, iPad mini 2019, iPad (5th generation) and iPad Pro.

Android: The app uses AR-technology that’s available in most new phones. Here is a list of supported devices.

5.How does it work?

The app creates a 3D environment with the camera and the internal sensors. The user marks the position of a tree and walks some distance from the tree and the inclinometer (angle) is uses to compute the height of the actual tree.

6. When does it not work as usual?

When the sun has set and its really dark, when you are measuring a single tree in a place with no structures (for example a single tree on a snowfield) and when it is really cold and rainy outside because it is not pleasant to touch the screen with your fingers under this circumstances. As a summary it works very good during the conditions when it is usual to do measurements.

7. How accurate is the measurements?

It is pretty accurate, the results are within a few percent. Take a look at the evaluation here: AndroidiOS.

If you have any additional questions or need help – send an email to

Arboreal Forest:

1. Is it only available on iOS?

Yes. We have learnt a lot by creating the height meter for both Android and iOS. It takes a lot of resources and time to create Arboreal Forest for Android. We also think that the Lidar sensor on the newest iPhones are great. There is some similar sensors on some Android devices, but it is uncertain if they will persist and be available in the long run. We have not started any development of Arboreal Forest for Android and we have no such plan in the closest future.

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