From The Apple Wiki

iTrack is an application used by internal testers on Apple's prototype team to administer and complete manual hardware tests ("tasks"). Tasks are given and completed on a loaned device, which must be returned unaltered at the end of testing. Functionally, it allows the user to track where any iOS/iPadOS hardware prototype is at any given time, see their current and past devices, runs tests, and enroll new devices under an employee's ID number and AppleConnect identity.