Apple doesn't provide this GPS trace to you unlike Google, but they do use it internally for Apple Maps. One tactic I heard from Apple Maps people in Austin was

Apple doesn't provide this GPS trace to you unlike Google, but they do use it internally for Apple Maps. One tactic I heard from Apple Maps people in Austin was determining business hours based on when iPhone traces started showing up or left a particular location. Apple started providing much better GPS hardware in iPhones after they got serious about Apple Maps, as the quality of their maps is directly controlled by the data they get (GPS traces from users to determine what new points of interest are, stale data bought from vendors that is then integrated into the base layer, etc)