Fi - GPS Dog Tracker

4.1
4.41K reviews
Content rating
Everyone
100K+
Downloads
Content rating
Everyone
Learn more
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About this app

Fi Series 3+ is the world's smartest GPS dog collar—now powered by AI.

Paired with a Fi collar, the Fi app brings you even closer to your dog. Track their location, monitor activity and health patterns, and get alerts if they ever leave a safe zone. It's peace of mind for the best pet parents out there.

FEATURES

GPS TRACKING

On vacation? Friend walking the dog? Instantly track your dog's location no matter where they are. Fi gives you the confidence to know they're safe from anywhere, anytime.

STOP ESCAPE ARTISTS

Designate safe zones around your home or dog's favorite places. If they leave without a trusted person, we'll alert you immediately. So if they wander anywhere, you'll be the first to know.

ACTIVITY MONITORING

Track your dog's step count daily and start streaks by achieving custom goals you set. Then see how they compare with similar dogs in the Fi community. Every step goes a long way toward keeping them happy and healthy.

AI BEHAVIOR INSIGHTS

Fi Series 3+ tracks more than just steps. Spot trends in activity, rest, scratching, licking, drinking, eating, and barking so you can stay in tune with your dog's health and habits, every day.

LOST DOG MODE

Never lose track again. If your dog goes missing, activate Lost Dog Mode to turn on rapidly refreshing live location updates until they're found.

BATTERY LIFE

With best-in-class battery, our collars lasts up to 3 months on a single charge. No other collar even comes close.

SUPPORT

Need help? We're here for you and your dog. Our support team is just a chat or phone call away when you need.

APPLE WATCH INTEGRATION

With our all new Series 3+, you can view your dog's location and activity directly on your wrist, so you're always connected, even without your phone.


OUR COLLAR

Available in 4 different colors and 5 different sizes to fit dogs of all sizes.

Fi works best when connected near a Bluetooth connected device with the Fi App or the provided charging base. Learn more about what we're building at: www.tryfi.com.
Updated on
Jul 8, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Financial info and Device or other IDs
This app may collect these data types
Location, Personal info and 7 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.2
4.31K reviews
Andrew Nelis
June 2, 2025
When Fi3 came around with the subscription model it was supposed to include hardware upgrades. They had raised the price, where the earlier models you bought the device and paid for the service, for a time, a reduced rate. So they have an actual upgrade which they claim faster seek times, a serious need, they have pulled the free hardware upgrades, right after my subscription reupped. And battery life went from months to maybe 2 weeks. The Apple move. Planned obsolescence. Screw us.
49 people found this review helpful
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Cecilia Gaultney
June 23, 2026
Doesn't work well with Android. I've been working with fi support for weeks on end now. the fi mini keeps going offline and I have to restart it. it doesn't work well with Android and they don't warn you, so I might be asking for a refund. Their support has been pretty good, they definitely are trying to fix it but it's just taken too long and I rely on it to keep my cat safe so it's non-negotiable that it doesn't drop connection randomly.
5 people found this review helpful
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Barking Labs Corp
June 24, 2026
We sincerely apologize for this ongoing issue. We understand how critical this is for your cat's safety, and we're sorry for the time it's taken for a resolution. If you'd like to contact support@tryfi.com or call 1-888-4Fi-DOGS (1-888-434-3647), we can update you on the status and be able to escalate it, if it's needed.
David Baker
June 20, 2026
First, the subscription amount is excessive. I received this as a gift so when it came time to pay again I decided against it. What I didn't realize is that without a subscription you get NOTHING. At least with Alltrails or Garmin (considering activity tracking apps and devices) you get some functionality, not here. Activity tracking is very inaccurate when you aren't carrying a device with the app running on it and I don't like running while carrying my phone.
5 people found this review helpful
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Barking Labs Corp
June 22, 2026
We appreciate the honest feedback, David, we hear you on the subscription and activity tracking concerns. We'd love to learn more about your experience and see if there's anything we can do to help. Please reach out at support@tryfi.com or 1-888-434-3647 and we'd be happy to chat!