Fi Series 3+ GPS Dog Collar & Tracker, 12-Mo Membership Included, Blue M

Product overview

Fi Series 3+ Smart Dog Collar: What to Know

Fi has been in this category longer than most of the newer entrants, and the Series 3+ is the current generation of its collar-integrated tracker, with Fi citing 2x improved GPS performance over earlier versions. We picked the Blue, size Medium configuration with the 12-Month Membership bundle, since it's the most broadly applicable size for a general buying guide — Fi sells this same Series 3+ hardware in sizes from XS through XL (collars are sized by neck measurement, not by breed or weight alone, so measure your dog's neck rather than guessing from a size label) and in other colors, plus separate listings that bundle a shorter 6-month membership instead of 12 months. Check the exact size and membership length on whichever listing you click into.

The purchase price on this listing includes 12 months of Fi Membership, the cellular and GPS service plan that actually powers live tracking — Fi's own listing copy is explicit that this covers activation with no separate signup fee at checkout. That coverage doesn't last forever, though: once the included 12 months run out, GPS tracking requires an active paid membership to keep working, and Fi's published membership pricing describes renewal options including a default annual prepaid term or a pay-every-six-months option, so plan for an ongoing cost well past the first year rather than treating the sticker price as the total cost of ownership.

Where Fi differentiates itself is in the depth of its behavior data: beyond live location and custom-shape virtual fences with escape alerts, the Fi app tracks steps, activity, and sleep/rest, and specifically flags behaviors like barking, licking, scratching, eating, and drinking so you can notice a change in pattern over time. A 'Lost Dog Mode' switches the collar to rapid location updates if your dog actually gets loose, and the whole household can share access to the same app. None of this is a substitute for veterinary care — it's pattern data that might prompt you to call a vet sooner, not a diagnosis in itself.

Key Listed Features