GPS Device That Follows a Car or Phone
This page is the CodyCross answer for the clue below from California, Group 1156, Puzzle 4 (Alcatraz Island).
Question is: GPS Device That Follows a Car or Phone
and the answer is: TRACKER
Word Meaning:
TRACKER — Agent noun of track; one who, or that which, tracks or pursues, as a man or dog that follows game.
Definitions from Wiktionary.