GPS Device Data, developed by PS Ventures Limited, is a free iPhone app now compatible with Apple Watch. This app provides comprehensive GPS information on a single screen, including latitude, longitude, bearing, course, speed, altitude, and device accuracy in various formats and units. Users can customize GPS updates with access to 'Desired Accuracy' and 'Distance Filter' settings, typically reserved for developers.

Furthermore, GPS Device Data tracks movements, displaying distance traveled, travel time, and average speed. Distance can be viewed in meters, feet, miles, kilometers, and nautical miles, while speed is available in meters/second, feet/second, mph, kph, and knots. This app is ideal for GPS users and developers looking to understand location services' impact on different devices. Note that non-3G iPads and iPod Touches rely on wifi hotspots for location, affecting accuracy when not near hotspots.