Hi, thanks for the question!
Which app operation do you mean, Navigation or Follow mode?
Navigation employs the GPS readings and specifically the bearing is used when speed is >10km/h to avoid such fluctuations.
Compass has its 2D and 3D modes (via tap), though such sensors are usually not reliable and there are interferences from near electronics.
Regarding the “Orientation support” feature, it’s now integrated in latest Kurviger 1.1.18. 