SatData shows every positioning reading your iPhone can produce — position, altitude, heading, accuracy, sun and moon — explained in plain words, for hikers, campers, geocachers and anyone who wants the numbers behind the blue dot. Pay once and it's yours forever. No subscriptions, no in-app purchases, no ads — every feature included. Everything is calculated on the phone, so it works on a summit, at sea and in a basement, with no signal at all. Every value says how sure the phone is and…