How do I make sure my phone is properly installed?

How do I make sure my phone is properly installed?

The application will guide you through this step:
  1. Align your phone's camera with Hestia's eyepiece. 
  2. Point Hestia at a clear part of the sky, a light source or a clear wall.
  3. Locate your smartphone using the magnets
  4. Look for the position where the green circle corresponds to the visible part of the image.