Series 3+
Meet the world’s smartest
AI-powered GPS collar.
Unleashed by AI
Instantly know where they are, how they're doing and what they need to feel their best.
Breakthrough Behavior Translator
Activity + Rest
Hit breed-based fitness goals and catch changes in typical activity and rest patterns.
Eating + Drinking
Spot meaningful shifts in appetite and thirst to stay a step ahead of potential health issues.
Licking + Scratching
Keep tabs on your dog’s skin health to spot signs of irritation and discomfort early on.
Barking
Get notified of unusually vocal or quiet days to address any stressors in their environment.
268,326
lost dogs found
Enjoy total peace of mind with award-winning live GPS tracking that’s faster than ever before.
Built to Last
Leading the charge
Up to 3 months of battery to outlast every adventure.
Performance meets comfort
Low-profile design made for 24/7 wear, even on the smallest dogs.
Midnight walks welcome
Keep an eye on your dog at night with colorful LED lights.
Ready to play rough
Industrial-strength stainless steel frame to win any game of tug-of-war.
Waterproof
Rigorously IP68/66K tested for fresh and salt water swimming.
Packed Full of Tech
AI companion
Meet your go-to resource for all things dog parenting.
AI vet records
Automatically organize and summarize all your dog's key paperwork in one place.
Tailored dashboard
Know what matters most with an all-in-one app for 24/7 peace of mind.
Apple Watch integration
No need to take your phone jogging. Just wear your watch.
Literally saved my life multiple times when my little Houdini has decided to go on unsupervised adventures.Kenya’s Mom
Know the difference.Track with confidence.
Not all trackers measure up. Fi gives real-time GPS tracking with no guesswork or gaps.
Microchips don’t track
Chipped dogs need to be safely brought to animal control or a vet for scanning. Fi always knows where they are.
AirTags aren’t meant for dogs
Limited waterproofing and short-range iPhone tracking fall short. Fi uses GPS to track your dog—no matter how far.
Fetching Styles
Clip on new colors. Unlock new looks.
Now on the Fi app
Join the Fi community and connect with dog lovers across the country.
