SeeLevel - visual clinometer App Reviews

The Guide us absolutely useless. I have a great knowledge of trigonometry and find this guide lacking in specifics and details as to proper usage. I have a high school protractor and a tangent table that works better.

So Im attempting to put in tracking solar arrays on a sloped hill. I need to know the angularitys of the sun from East to West and on the south. I view the east west and southern tree lines to know how many trees I need to take out. This app is awesome.

Does me no good if it wont open. Yes I have calibrated it