A tracker on the collar, or a collar that is the tracker?
Updated 20 September 2026
Both put a location on your phone. The difference is what your dog wears, and how much the kit tells you beyond where your dog is.
A clip-on is a small box that threads onto any collar or harness strap. A GPS dog collar is the collar itself, with the electronics built in, so your dog wears one piece of kit and nothing hangs off them.
Think about the day the collar comes off for a bath or a swim, and about how often you swap collars. A clip-on moves across in seconds, and a smart collar keeps everything in one place on your dog's neck.
Side by side
Clip-on tracker
A pod that fixes to the collar you already own, and moves to another collar or another dog whenever you want.
Suits
- Keeping a collar you like
- Households with more than one dog
- Starting with one small piece of kit
Ones we like
Tractive
A GPS dog tracker that clips to the collar and shows live location with escape alerts.
A Tractive subscription covers the built-in SIM and data, so set that up first and the tracker reports live wherever there is mobile signal.
Tractive
XL GPS Dog Tracker, 2026 edition
A GPS dog tracker built for dogs over 20 kg, with up to six weeks of battery.
A Tractive subscription covers the built-in SIM and data, and the tracker reports live wherever your dog has mobile coverage.
Pawfit
A clip-on GPS dog tracker with a speaker that plays your recorded recall.
A Pawfit subscription covers the SIM and data, and recorded recall works best when your dog already knows the command from training.
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Smart collar
A collar with the tracking built in, usually reporting activity and sleep alongside the location.
Suits
- Health and behaviour data as well as location
- Dogs who wear one collar all the time
- One piece of kit on the collar
One we like
Fi
Series 3+ Smart Collar, medium
A GPS dog collar with the tracker built in, and the first year of membership included.
This is the medium collar and Fi run sizes from XS to XL, so measure your dog's neck and order the size their guide gives.
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Common questions
Will a clip-on tracker fit my dog's collar?
Nearly always. They thread onto a flat collar strap, and the makers sell a spare strap if yours is unusually wide. For a small dog, check the tracker's weight against the collar so it sits comfortably.
Do dog trackers need a subscription?
The GPS ones come with a plan, on both styles, because they use a mobile network to report their position. A Bluetooth tag runs with no subscription, and our comparison of the two sets out where each fits.
Can I use one dog tracker for two dogs?
A clip-on moves between dogs in seconds, and it reports on whichever dog is wearing it. Two dogs who both roam are happiest with one each, so each of them shows up on the map.
Will a dog tracker come off if my dog swims?
Check the maker's water rating and the fixing before a swim. These are built for weather and for wet dogs, and the strap or clip is what holds it in place, so fit it snugly on the collar.