On 1/23/17 10:14 AM, Barry Merrill wrote:
My iPhone 7 does NOT need motion for the Compass App.
The app immediately rotates to the heading of the phone,
while the phone was flat on the desk.
iPhones (and Samsung phones, as well as basically all smart phones) have
a magnetometer in them. Like all magnetic sensors, they are affected by
local conditions..
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