Use the app to find out the altitude (inclination in degrees, NOT height) and azimuth of any point you wish.
The app shows you a 3d representation of the direction (bearing) . It acts as a compass and shows you North, South, East and West along with other intermediate directions. The altitude of the object being pointed is shown and can be used as a sextant. Long press to take a snapshot of the Altitude and Azizmuth readings.
The orientation of the phone in terms of pitch, yaw, and roll is given along the magnetic strength reading.