One of the best-reviewed and most popular iPhone tracking apps is Apple’s Find My iPhone, according to Apple.com. The app allows a user to locate and track a lost iPhone using a computer or any other iOS device.
To use Find My iPhone, a user logs in to Apple’s iCloud service using an Apple ID. Find My iPhone locates the phone using GPS and displays its location on a map. Using the app, a user can track the iPhone’s movement as long as the device stays on. If the phone powers off, Find My iPhone displays its last known location. The app also allows users to lock their phones remotely and erase all data if necessary.