Hi I am trying to find some sort of compass app/ digital compass that can used without a satellite dish affecting it.
They primarily use a magnetometer chip to sense the the earth's field relative to the device. The chip senses the field in three directions, and from that can figure where the magnetic field pointing north is. It can also detect direction of movement with accelerometers and GPS.
Answered by Brodyn W from Perth
Smartphones with a compass feature use what is described in your quote (electronic compass on a chip). This is sometimes also found in up-scale digital watches.I've just found this on one of the crapple sites
I never knew that