New Fi Series 3+ Smart Dog Tracker Collar – AI GPS for Dogs, Health & Behavior Monitor, Virtual Fence, Escape Alerts, Waterproof, Apple Watch Compatible 12Mo Membership Included
$189.00







Price: $189.00
(as of Nov 09, 2025 03:15:42 UTC – Details)
Product description




TRACKS EVEN FURTHER
Airtags use the proximity of iPhones to track objects. If your dog is not within 200ft from an iPhone, the Airtag system won’t be able to find them.
Fi uses GPS tracking with nationwide coverage that works wherever they are, the second they escape.

XS and Small Example Breeds:
XS: Maltese, Pomeranian, Toy Poodle, etc.
Small: Boston Terrier, Cairn Terrier, Cavalier King Charles, Dachshund, Jack Russell, Mini Aussie, Pug, etc

Medium Size Example Breeds:
Aussie, Beagle, Border Collie, Corgi, English Bulldog, etc.

Large Size Example Breeds:
Boxer, Doberman, German Shepherd, Golden Retriever, Labrador Retriever, Pit Bull, Siberian Husky, Standard Poodle, etc.

X-Large Size Example Breeds:
Bloodhound, Great Dane, Great Pyrenees, Mastiff, Newfoundland, Rottweiler, etc.
What’s in Your Box 
1
2
Package Dimensions : 9.13 x 6.69 x 1.97 inches; 2.72 ounces
Item model number : FC3B
Batteries : 1 Nonstandard Battery batteries required. (included)
Date First Available : July 10, 2025
Manufacturer : Fi
ASIN : B0FH8QH54Y
Best Sellers Rank: #8,142 in Pet Supplies (See Top 100 in Pet Supplies) #5 in Pet Location Trackers
Customer Reviews: 4.1 4.1 out of 5 stars 988 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
NEXT-GEN GPS TRACKING FOR DOGS: Fi Collar Series 3+ is our fastest, most reliable smart collar yet—featuring 2x improved GPS performance to locate your dog in real time, nationwide, with no range limits. Designed with upgraded antennae to keep you connected when it matters most.
ESCAPE ALERTS + LOST DOG MODE: Custom virtual fences alert you the instant your dog leaves a safe zone. If they’re on the move, Lost Dog Mode activates live tracking with rapid location updates so you can act fast. A pet GPS tracker for dogs that you can count on.
AI-POWERED HEALTH + BEHAVIOR TRACKING: The first smart dog tracking collar to detect activity, rest, barking, licking, scratching, eating, and drinking—giving you a complete picture of your dog’s well-being. It’s more than a dog pedometer.
APPLE WATCH INTEGRATION + AI COMPANION: View live location, activity, and Lost Dog Mode from your Apple Watch. Plus, ask the built-in AI Companion anything—from behavior questions to care tips. This apple iphone pet tracker for dogs even delivers personalized reminders for vet visits, vaccines, and more.
SMART VET RECORDS: Never lose track of your dog’s medical history again. Upload their health documents and let Fi’s GPS dog tag organize, summarize, and store them—all in one place.
Customers say
Customers find the GPS collar effective at tracking dogs’ locations and activities, with exceptional battery life that charges quickly. The device is easy to set up and use, and provides peace of mind for pet owners. While some customers say it works well and is worth the money, others find it completely useless and too expensive for its functionality. The accuracy receives mixed reviews, with some finding it very accurate while others report it’s not accurate at all.
6 reviews for New Fi Series 3+ Smart Dog Tracker Collar – AI GPS for Dogs, Health & Behavior Monitor, Virtual Fence, Escape Alerts, Waterproof, Apple Watch Compatible 12Mo Membership Included
Add a review
$189.00


Spectaclephoto –
We tested the best dog trackers against one another
My husband and I rescued our dog Charlie 4 months ago. He’d been badly treated as a puppy and so sadly was still very anxious and skittish. We have been training him and he’s got better but at the start any sudden sounds or noises would trigger him, and he would immediately try to bolt.We live in the suburbs, but have a good sized property. Our yard is fenced all the way round, and all the dogs we’ve ever had have always loved it as they can roam off leash. That is except for Charlie…..who just tries to escape.A couple of close calls later, we realized that no doors could be left open, and someone would always need to keep an eye on him when he’s outside. I was still so worried that I looked into what we could use to track him so that I could have more peace of mind.We wanted to make sure that we got this decision right. So, we tested 3 of the best ones against each other: Tractive, Whistle, and Fi. I don’t typically leave reviews, but my husband said we should as it may help save another dog one day!We tested them over the course of 2 weeks, and focused on the following areas:1. Location Tracking Accuracy2. Escape Alerts (when your dog gets out)3. Devices (size, weight, and comfort)4. App (ease of use and other features)1. Location Tracking AccuracyWe really wanted a tracker that we could trust, so this was very important to us. We had to make sure that if Charlie was to get out unexpectedly, we would know exactly where he was to go get him. To test this, we did several walks with each of them where me or my husband would take Charlie on a walk away from the property and I would watch it on my phone to see where they were going. Some of these walks were around our neighborhood, and some were on hiking trails that were a bit more rural.Overall, there was some variation in the tracking, with the biggest difference being that the Fi and the Tractive are the only two that offer live location tracking, Whistle does not. Another thing we did learn about all of them though is that they will only be able to work in real time with cell service. We talked to support about this and it turns out that’s how they send the GPS location back to your phone.We thought this was important, and so focused on testing hikes that had spotty coverage to see which tracker would respond best. Fi was the only one that would give updates throughout the walk, even if they were intermittent. It seems that it repeatedly tries to ping the location back to your phone, whereas the others were only able to send some reports later on once we were fully in a cell service area.2. Escape AlertsThis was a quick one. I had my husband leave with Charlie and without his phone and I timed how long before I got a notification that he had left. We were trying to recreate a potential ‘escape situation’. This was the order we got our notifications:1. Fi – 1 minute 29 seconds2. Tractive – 3 minutes 47 seconds3. Whistle – 4 minutes 13 seconds3. DevicesThis is getting very long as I type it so I’m attaching some pictures of them alongside each other instead!The Tractive is the only one that attaches to your own collar and you don’t need to swap your collar out for, but the Fi is by far the smallest and lightest of the group. Whistle’s surprised us as we didn’t expect it to go so far back into the dog’s neck.4. AppWe actually hadn’t thought about including this section when we first started testing, but after using them all for a few weeks we wanted to include it as they each have some cool features.All these companies did a good job with set up. They all took under 10 minutes to get up and running and were straightforward processes. Running through each of them in more detail below:Fi – tracks their location, activity, health and sleep. This is the only one to track sleep which was really cool to see. It’s also the only one with a built in LED light which was a great add for our nightime walks. It also had the longest battery life of all of them and was the only one that we didn’t need to charge over the 2 week period.Tractive – tracks their location and activity. Mainly focused on location but has a couple of neat activity features. Battery didn’t last very long.Whistle – tracks their location, activity and health. Definitely the most focused on health, and tracks things like scratching and licking. Didn’t find these that accurate though.Hope this helps some other dog moms. After the testing we decided to keep our Fi and return the others and are still very happy with our decision.
SUSAN M ADAMS –
Great tracking collar
Great dog tracking collar. Moved to a new location and needed something in case my dog gets lost. She had been used to running within a 2-1/2 acre fenced yard. Will be having a fence installed at new property . Need to figure out how to get text messages when dog is out of range. I get a notification but no text. The collar is much heavier than my dog is used to but she’s okay with it. It does seem to expand and gets loose as I have to keep adjusting it smaller.
W. RADIO –
Excellent performance-Good gift for dog owners-It WORKS!
Bought as a gift for a friend whose dog got loose and made it home the next day.This collar’s system has more than once since it’s gifting helped the owner to retrieve his 10 year old dog. The dog did not normally “wander” but when a second, younger dog joined the family, it began. The ability to draw “home area” in the app saves the battery by not checking in as much (or so it seems) and the charging cradle makes the recharging easy for my friend. It appears you can add cradles if necessary to expand home reach, but check with the manufacturer on that.A great gift for any dog owner where there’s a chance the dog may run…..notifications so far have been FAST, and I’d recommend it! There are many collars out there that do similar things, but when comparing recently with strangers who had a different brand, they liked the fact this one had more options on the App and that it seems to pinpoint more exactly than most.Peace of mind for dog owners for sure.
Farmer –
Works great but expensive for multiple pet home
This is my second Fi. My first was for my dad after he was hospitalized and his girl ran away for 31 days. Once home we vowed to have her every move tracked! Thankfully, she’s never run away again. We were able to set up her new home once dad passed easilyaway.Our Rottweiler went on an adventure with the neighbors dog and was missing for 12 hours. He was wearing another popular tracker (along with my other dogs) but he had already been off our farm over 30 minutes before notice was sent to my phone …neighbor notified me before his tracker. After finding him I immediately ordered him a Fi tracker. The Fi stays charged a full month for us on our other dogs and looking forward to the same with our Rottweiler. His current one only stays charged for a 7-9 days. I love the smaller and less bulky Fi as well. The subscription cost is the only reason the rest of our dogs are not using Fi…..cost is prohibitive for our multiple pet home.
Misty Frogg –
As expected
Upgraded to the 3+ collarSeems to work well. Love the new collar. Easy to set up. Reasonably accurate. Definitely waterproof. Fits great.It’s important to be aware of the limitations of this collar, which simply means if there’s no cell service you have limited options however, in this city, it seems to work really well. I’m looking forward to seeing how the 3+ and all of its extras works with this. I had a three for the last year and chose to re-up again so that’s why it gets a five star review.Takes a few days for all of the extras to set up, so I’ll update this when all of the new tracking start starts picking up
Jose Heredia –
Este producto no sirve fuera de estados unidos, gaste mucho dinero por él, pero la aplicación no tiene cobertura en mi país y trate de regresarlo, pero Amazon no pudo ayudarme y las paqueterías locales se lavaron las manos además de que por parte del vendedor no me proporcionaron un número de guía válido, desafortunadamente tuve que quedármelo, la peor experiencia de compra que he tenido, si eres de México u otro país NO COMPRES este producto!