This is my version of incidence digital meter adapted to be used with the app clinometer. I have the Robart Incidence meter VBlock Clamps and 16" Long Parallel Bar, so I decided to adapt from the idea of this site http://planet-soaring.blogspot.com.br/2016/02/a-smart-digital-incidence-meter.html

Clinometer is perfect for our use: https://play.google.com/store/apps/details?id=com.plaincode.clinometer&hl=fr