Introducing Fi, the world’s first LTE smart dog collar.

Paired with a Fi collar, the Fi app brings you even closer to your dog. View your dogs location and activity levels on the app, and be alerted if they ever escape from a designated safe area. The smartest pet parents choose Fi.


On vacation? Friend walking the dog? Instantly track your dog’s location no matter where they are. Fi gives you the peace of mind to always know that your dog is safe.

Make sure your dog never escapes from your backyard. Fi lets you designate safe zones around your dog’s most popular residences, whether that’s your house or your grandma’s, and we’ll alert you if they ever leave home without a walker. So, if your dog runs out the gate you forgot to close, you’ll be the first to know.

Fi measures the steps your dog takes and compares it to other dogs wearing a Fi collar, so you’ll always know how much exercise they’re getting, and how much more they need. Set daily goals to hit and view all previous walks and activity. Keep your dog happy and healthy with Fi.

We’re putting an end to lost dogs. If your dog’s got out, enable Fi’s unique Lost Dog Mode at the click of the button. A red light will appear on their collar, and the collar will report its location every minute as they move. Make sure you never lose hide and seek again, with Fi.

Introducing the world’s first LTE dog collar. Running on a brand new LTE-M network, you’ll only receive the most accurate location reports and always know where your dog is.

If we lose our dog the last thing we should worry about is battery life. Part of the reason we built Fi is because we didn’t feel that other smart collars offered enough value to us dog owners. On average, our collars last 3 months between charges. So, it’s another thing you don’t have to worry about.

We care about your dog as much as you do. With live agents ready to talk to you whenever you need, we’ll be right by your side for your journey with Fi.

Coming in two different colors and three different sizes, Fi works for any dog over 20lbs.

Fi works best when connected near a bluetooth connected device with the Fi App or the provided charging base. The latest iOS is required to run Fi. Learn more about what we’re building at:

What’s New

Version 2.8.1

Bug fixes and performance improvements.

Ratings and Reviews

4.2 out of 5
709 Ratings

709 Ratings

JennicaRachelle ,

Better than al of them!

So I’ve tried a few gps collars. The one I had before FI was LINK AKC. Fi’s ability to hold a charge more months alone makes it worth it. Being able to set safe sones on the fly is also really great and helps reduce unwanted alerts. I recently adopted a 2 year old Australian Cattle Dog , and Fi has made training to be off leash so much more less worrisome. My 10 year old also likes to walk her on his own, so having the collar helps ease my worries for both my babies. So far our ACD has been doing great, and the light feature works wonderfully when she’s playing off leash at night. I am also impressed with the waterproofing. Libby (our pup), jumped in a creek to catch some fish, and for a brief second I thought “oh no! Her collar!” , and then I remembered that Fi is awesome and I didn’t have to worry. The free month of GPS for inviting friends was a nice surprise! so thank you! 🙏 Can’t wait to see what new features and updates come along. If there is a way to set alarms and reminders for when she is due for her walk, that would be great. Or if the Fi app can recognize patterns, and create reminders based on past walks/routines, that would be awesome too. 🐾🐾🐾👍🏻🙏 and maybe teaming up with the app WAG- would be cool too. Like maybe offer a discount on wag walks if they have a Fi collar that coordinates etc. That way when a wag walker comes to walk your dog, it recognizes the walk as safe. Just some thoughts!

kfkio ,

Absolutely amazing!

My boyfriend and I adopted a sweet 2.5 year old husky. She is the most kind and gentle dog, but she is a runner. I bought this collar long before we actually had her, just to be ready when we did have her. In the first 3 days that she was with us, she got out twice. With the help of this INCREDIBLE collar, we found her both times within the half hour. The GPS updating every minute makes finding our fast dog so much easier. Just that would have been enough for me. However in addition to that, I'm able to set dog walkers, so that when somebody is watching her they have access to the app. I'm able to see that she is with them and where they are. If she gets lost while someone is watching her, they're able to use the lost dog feature as well. It provides so much peace of mind. But I'm not done. In addition to the peace of mind and incredible battery life, it has a light that flashes at night so when you're walking late at night you can see where she is. All of this is controlled by a well thought out app, that tracks your dogs steps, ranks you with other dogs in your breed category, and allows you to post and view pictures of your and other dogs! I have told every dog owner I know about this. I'm in love with this collar.

tdk#1fan ,

AMAZING Customer Service

I have two Fi Collars, one for my Alaskan Husky who is not only a Houdini but is as fast as the wind, and one for my German Shepherd. To start off, my Husky has gotten out 5 times since getting the collar...4 of those times 3-6 miles away, nowhere near our small neighborhood. It could have been a very bad ending each time but Fi let me know she got out and when I put on the lost dog mode feature it gave me minute by minute updates of her exact address. LIFEsaver. Literally. Since she finds a way to get out so frequently the long lasting battery is a MUST. I charge the collars maybe once every 2 weeks if that and other than that I never take them off. The battery has only gone below 30% twice, and we were in an area with spotty cell service.

Almost more than the collar itself, I love the company. I’ve had various questions and small issues, once my dog even broke her collar somehow, and they sent a replacement that day! They are always able to answer questions and are friendly and very good at troubleshooting and also making me aware of features I didn’t know about. Love the company, love the collar! Great job Fi!!


Barking Labs Corp.
93.6 MB

Requires iOS 12.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
This app may use your location even when it isn't open, which can decrease battery life.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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