Tree height measurement Android App

The description of Tree height measurement: This app can be used to estimate tree height. The quality of your measurement depends on your android device and on how well you can hold the device in your hand. The app does not replace a professional height meter. It is made for quick height estimation of trees. In addition forestry students can use it to become accustomed to measuring tree age: start the app and choose one of the two measuring methods. For method 3winkel (3 angles) you have to put a marker on the tree or set a pole next to the tree. The marker or the pole should reach relatively high from the ground. Measure the height of the marker or the length of the pole and add the value to the edit field of the app (see also settings). Then find a spot where you can see and measure the tree. Hold your android device (telephone or whatever) so that you can aim with eye over the long narrow side the target..