This is a very polished skill tree that is clean and easy to use. I have not encountered any bugs and the execution is perfect. There are no ads in the app currently but instead a supporter pack. It includes things like jewel socketing, adding item stats, etc. but most importantly it allows you to save builds. Three dollars I feel is a lot for the features but I see no problem with it as the app is flawless and has no ads.
Gdfjkgkkhttc about POEMate