The best alternatives to Tagg are Findster Duo, Whistle 3, and Tracy Trackers. If these 3 options don't work for you, we've listed a few more alternatives below.
Whistle 3 is a top-rated GPS location and activity tracker for your pet. The Whistle device attaches to your pet's collar and, through an app, makes it easy to track your pet's location, distance traveled, activity, rest, and much more.
A revolutionary, 21st century technology app to locate & rescue missing pets. The only Live – in Real Time – Pet Rescue app! No Battery, Chip or Tracking Device Required, Pet Hero is 100% free for everyone around the globe.