10,000,000 dogs
are lost in the
U.S. every year.

We're here to change that.

Fi has been built
for lost dog scenarios.

Battery Life

Up to 3 months of battery life.

See how we compare

Lost Dog Mode

Live location tracking so you can bring your escape artist home safely.

20-30% more coverage

LTE-M gives you more coverage than any other smart collar, across the US.

See how we compare

Lost dog Mode

Lost Dog Mode turns on live location tracking to help you find your escape artist as quickly as possible.

While Lost Dog Mode is active, you’ll receive notifcations about your pets location every minute. It’ll also activate the red pulsing LED light on the Fi collar to make your dog easier to spot at night or in low visibility conditions.

Lost Dog Mode

How it works

  • Activates red pulsing collar lightMakes it easier to spot at night or in low visibility.

  • Instantaneous escape alertWe'll send an alert to your phone the moment your dog leaves its safe zone.

  • Live location trackingWe'll continuously keep you updated on your dog's location in real time.



About Fi
Fi Original Stories

Helping Connie recover her newly rescued pup

I’m so glad to have peace of mind now... as long as he has his Fi Collar on I know I’m always going to be able to bring him back home Connie & Astro

“Had one for about a month and so far we love it. We do a lot of hiking off leash and this helps us keep track of our boxer Jake!”
Jake's Dad

“Fi helped me find my lost dog today! He wandered away while I was distracted. I couldn’t find him for about 30 minutes and was really panicked... I can’t say enough how awesome this collar is! Jack is safe and sound at home 😍”Jack's Dad

“We use our collar everyday! It's been a great way to keep track of his exercise goals and remind ourselves to get him out, even when it's cold, dark, or raining 🌧”

“Just saved my girl last night. She went on a freedom run at 9pm. Never would have found her ... without it.”Stephanie Bishop

“Unbeatable battery life”

“Walked Parker today around Boulder with Fi. The 3-month battery life is awesome! Had the collar on for 7 days and it's at 92% full!”

“I bought one for Beauregard it works like a charm. I don’t worry about what neighbor's house he is visiting. I just look on my phone.”Beauregard's Dad

“I found her thanks to Fi 🤗. I now know exactly where Sadie is. I also get a notification whenever she leaves the safe zone and it tracks her steps and location in real time!”

“The longest lasting tracking device on the market”

Fi Original Stories

Giving Ellie a
sense of freedom

With the safe zones the app will notify us if she goes outside of the safe zone that I set... It has given her a lot more freedom and it has given us a lot more freedom. We just don’t worry anymore Sarah & Ellie

Fi Original Stories

Hide & seek with
Goose the dog

The longest it’s ever taken to find him has been 10 minutes [and it was over a mile away]... We’re alerted, so we now know the minute he steps off the property Mandy, Carl & Goose


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Unmatched Battery Life

Up to 3 months between charges under
typical usage conditions.

Shield icon

Durable Design & 1yr Warranty

Chew-proof, water-proof (even the ocean), and generally dog-proof.

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Service & Coverage

With the new LTE-M Network, always have the best coverage no matter where you are in the US.

An image of the Fi collar