Do I need a GPS collar if my dog is microchipped?

A microchip only helps after someone finds and scans your dog, whereas a GPS collar or tracker lets you locate a dog in real time. Across the reviewers we read, owners often pair both, plus an embroidered ID collar, since each covers a different failure mode. GPS units add ongoing costs and battery management, so they're best for escape artists, rural properties, or off-leash dogs.