
Fi New Series 3+ Smart Dog Tracker Collar [6 Month Membership Included] GPS Tracker for Dogs with Health & Behavior Monitoring, Escape Alerts, Waterproof, LED, Apple Watch Compatible (Blue, Large)
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Purchase options and add-ons
| Brand | Fi |
| Material | Plastic |
| Included Components | Charger, USB Cable |
| Item Weight | 77 Grams |
| Battery Capacity | 285 Milliamp Hours |
About this item
- NEXT-GEN GPS DOG TRACKER: The Fi Series 3+ collar is our most accurate and reliable smart collar—featuring 2x improved GPS performance from past devices to track your dog’s real-time location, nationwide, with no range limits using the Fi app.
- ESCAPE ALERTS: Custom virtual fences use the Fi app to alert you the instant your dog leaves a safe zone. If your dog escapes, get real-time notifications from your GPS dog tracker every few seconds as your dog roams.
- 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. Review all your dog’s health and behavior data right in the Fi app.
- APPLE WATCH INTEGRATION + ANDROID & IPHONE COMPATIBLE: View live location, activity, and Lost Mode from your Apple Watch. Plus, ask the built-in AI Companion anything—from behavior questions to care tips from your smartphone. This dog tracker delivers personalized reminders for vet visits, vaccines, and more through the Fi app.
- SMART VET RECORDS: Never lose track of your dog’s medical history. Add vet receipts, pet insurance, vaccine records, training certificates, and other important health documents in the Fi app to help organize, summarize, and store the documents—all in one place.
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Product description
Fi GPS Trackers
Fi Series 3+ Pink 12 MN
Add to Cart
| Fi Mini Small Dogs 12 MN
Add to Cart
| Fi Mini Cats 12 MN
Add to Cart
| Fi Series 3+ Blue 12 MN
Add to Cart
| Fi Series 3+ Yellow 12 MN
Add to Cart
| Fi Series 3+ Gray 12 MN
Add to Cart
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Customer Reviews
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4.1 out of 5 stars 1,252
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3.6 out of 5 stars 123
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3.5 out of 5 stars 64
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4.1 out of 5 stars 1,252
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4.1 out of 5 stars 1,252
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4.1 out of 5 stars 1,252
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Location
| GPS & LTE tracking | GPS & LTE tracking | GPS & LTE tracking | GPS & LTE tracking | GPS & LTE tracking | GPS & LTE tracking |
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Battery life
| Up to 3 months battery life | Up to 6 weeks battery life | Up to 6 weeks battery life | Up to 3 months battery life | Up to 3 months battery life | Up to 3 months battery life |
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Charging
| Wireless charging base | Easy USB-C charging | Easy USB-C charging | Wireless charging base | Wireless charging base | Wireless charging base |
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Hardware
| Customizable night light | 0.56 oz | 0.56 oz | Customizable night light | Customizable night light | Customizable night light |
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Waterproof
| Waterproof (IP68/66K) | Waterproof (IP68) | Waterproof (IP68) | Waterproof (IP68/66K) | Waterproof (IP68/66K) | Waterproof (IP68/66K) |
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Product dimension
| 50.5 x 30.5x 11.5mm (L xWx D) | 42 x 30 x 12.5mm (L x W x D) | 42 x 30 x 12.5mm (L x W x D) | 50.5 x 30.5x 11.5mm (L xWx D) | 50.5 x 30.5x 11.5mm (L xWx D) | 50.5 x 30.5x 11.5mm (L xWx D) |
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Health
| AI-analyzed behavior tracking | AI-analyzed behavior tracking | Coming soon to Fi Mini Cats | AI-analyzed behavior tracking | AI-analyzed behavior tracking | AI-analyzed behavior tracking |
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Collar fits on
| Only Fi-affiliated Maker Bands | Most Collars and Harnesses | Most Collars and Harnesses | Only Fi-affiliated Maker Bands | Only Fi-affiliated Maker Bands | Only Fi-affiliated Maker Bands |
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Apple Watch
| Location updates on your wrist | Coming soon to Fi Mini Dogs | Coming soon to Fi Mini Cats | Location updates on your wrist | Location updates on your wrist | Location updates on your wrist |
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Made for
| Designed for all dogs who roam | Ideal for puppies & small dogs | Ideal for cats | Designed for all dogs who roam | Designed for all dogs who roam | Designed for all dogs who roam |
Product information
| Battery Capacity | 285 Milliamp Hours |
|---|
| Item Weight | 77 Grams |
|---|
| Enclosure Material | Plastic |
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Warranty & Support
Feedback
| Brand | Fi |
|---|---|
| Built-In Media | Charger, USB Cable |
| Manufacturer | Fi |
| UPC | 850064800494 |
| Model Number | FCB3 |
| Mfr Part Number | FCB3 |
| Warranty Description | 1 Year Warranty |
| Unit Count | 1.0 Count |
| Best Sellers Rank |
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| ASIN | B0FHHXY7T3 |
| Customer Reviews |
4.0 out of 5 stars |
What's in the box
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
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Reviews with images
The most safety you’ll ever feel!
Top reviews from the United States
- 5 out of 5 stars
Highly recommend for off leash walking.
Reviewed in the United States on March 30, 2026We hike on a farm where Layla can run off leash. I took a different route from our usual and after not seeing her for a short while I started whistling. She didn’t come and the panic began. Without going into all the details of speed walking back to the truck, then back to where I lost her, getting through the gate without letting the cows out and huffing and puffing up a very steep hill while trying to whistle; I found her. We came home, called the neighbor to see which tracking collar he had and ordered the Fi. We have had it for 5 months and it is fantastic. We are in a very rural area but the Fi has never went out of service. The battery lasts for at least a week and she wears it every day. It is rugged and waterproof. Layla is a Vizsla, very active. She runs through woods, fields and creeks and her collar has held up perfectly. It is also interesting to see how far she runs on our walks. I have had to use lost dog mode on several occasions. Her recall has improved tremendously from when she was lost. I think it scared her also. It is very reassuring to be able to start lost dog mode and see exactly where she is at. I am very happy with the quality and performance of the collar.
14 people found this helpfulSending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 5 out of 5 stars
Stupid small price for risk reduction!
Reviewed in the United States on April 2, 2026I didn’t buy this for my springers and bought Apple tags instead. VERY limited value. For my Maltipoo I decided to try because I moved to an area with a busy road. I love it. It fits her little self comfortably, (She wears in addition to another collar). I can spot her in the map, get notices when she leaves usual areas, and surprise! It monitors all kinds of things! Eating, scratching, drinking, barking, exercise and more! When a friend dog sits I know where/when/if they took a walk, and the path they took. Charges easily, holds charge adequately, and appears to feel invisible to her. She never scratched or pawed at it. I actually recommend this heartily! It even has a light I can remotely activate. COME ON! Who knew??

5 out of 5 starsStupid small price for risk reduction!
Reviewed in the United States on April 2, 2026I didn’t buy this for my springers and bought Apple tags instead. VERY limited value. For my Maltipoo I decided to try because I moved to an area with a busy road. I love it. It fits her little self comfortably, (She wears in addition to another collar). I can spot her in the map, get notices when she leaves usual areas, and surprise! It monitors all kinds of things! Eating, scratching, drinking, barking, exercise and more! When a friend dog sits I know where/when/if they took a walk, and the path they took. Charges easily, holds charge adequately, and appears to feel invisible to her. She never scratched or pawed at it. I actually recommend this heartily! It even has a light I can remotely activate. COME ON! Who knew??
5 people found this helpfulSending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 1 out of 5 stars
Read the reviews before you buy
Reviewed in the United States on April 22, 2026Dont buy this unless you're desperate!
So many things to mention.
First off.. nothing worked the way the instructions indicated. You scan a qr code and a menu screen guides you they the set up. The device that actually tracks your pets location and goes on the collar doors not connect to the collar the way the instructions indicate. It didn't mention you can get stuck trying to do connect it the wing way as there are 2 ways to insert it. There is only one way it connects.. so confusing.
Another problem i ran in to was the collar size. If you make a mistake on the size you can't order a collar only. You have to buy a whole new set with GPS tracker. I sized mine correctly but the cooler doesn't fit my pet so be careful.
Once you get the collar activated which means getting the base connected to your home Wi-Fi your supposed to be done. My base station would not connect to my wifi So I had to do it manually. Once I was able to get it online... I cannot activate the collar which is required to be touching the base station. After I got everything connected and online and the geofence set. I get alerts saying that the pet has went outside the boundary. Even though the collar is still on the base station charging. Then I get alerts saying that the base station is disconnected. Even though it is connected and the Wi-Fi in the house is still on. So overall I don't like this product. I haven't been able to use it outside of the home because I had to go buy a different collar which is by a third party provider and expensive to be fi compatible.. bottom line is they made a proprietary collar and GPS that is nearly impossible to alter to get it to work with your custom collar. If you have your pet's name or anything else like that on there. I haven't even tried using customer service cuz I've been so frustrated with simply just trying to get this set up. Once I get my replacement collar and I'm able to go drive around to see if my pet is tracking in real time, I'll provide a second review and update.
18 people found this helpfulSending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 5 out of 5 stars
Peace of mind
Reviewed in the United States on May 25, 2026A must for outdoor, active dogs. This tracker collar gives me peace of mind when I'm out in the fields with my over-active, bird obsessed GSP. I always know his distance from me and his position when he's out of sight. This is a great product. I've been using it for a year now and it's functioned perfectly. I won't take Beau (my GSP) out on walks or hunts without his tracker collar. A wise investment for sure. Worth 5 times what I paid for it in terms of peace of mind.
3 people found this helpfulSending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 4 out of 5 stars
Great after the actually work
Reviewed in the United States on April 25, 2026When I first got the collars I was super irritated as I could not get the base to connect to my internet and then I couldnt get the collar to connect to the base. After over a week of fighting with it, I finally got it to connect and its been great since. I have 2 of them, one for each of my dogs, and they have been great being able to watch their activities and locations. I will be getting new collars thst fits the Fi but these are OK for now.
6 people found this helpfulSending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 5 out of 5 stars
Best money I have spent for peace of mind
Reviewed in the United States on March 2, 2026We have an Australian Shepard who is very active. U fortunately our 25 acres doesn’t contain her and she continuously left our property and we would have to go looking for her. I found the Fi Series 3 and decided to give it a try. This is the best solution we could have come up with. Now we can rest in peace knowing that we can always find her. I was not sure this would work in the country but it amazing. We set up a safe zone and we get a notification if she leaves it. She is really fast so she can get a distance away before we see she has left. But now we know where she is headed. Best money I have ever spent…..worth every penny. Great app and so easy to set up and use. Very accurate
17 people found this helpfulSending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 5 out of 5 stars
The most safety you’ll ever feel!
Reviewed in the United States on April 28, 2026This is a fantastic product. even though my dog is microchip and she wears a tag I wanted to be able to know exactly where she was and not wait for someone else to find her if something happened. My dog ran out of the fence and it was gone before we even knew she was out. I looked at my app on my phone and knew exactly which address she was at and simply went and got her. It can’t get easier than that. I only have to charge the battery about every other month and then I just forget about it. You just set up the app and put the collar on and you’re done. I just wish the collar was a little thinner because my dog is small but fat.

This is a fantastic product. even though my dog is microchip and she wears a tag I wanted to be able to know exactly where she was and not wait for someone else to find her if something happened. My dog ran out of the fence and it was gone before we even knew she was out. I looked at my app on my phone and knew exactly which address she was at and simply went and got her. It can’t get easier than that. I only have to charge the battery about every other month and then I just forget about it. You just set up the app and put the collar on and you’re done. I just wish the collar was a little thinner because my dog is small but fat.
4 people found this helpfulSending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 3 out of 5 stars
Some things you might want to know before you buy.
Reviewed in the United States on May 22, 2026So far it works well. A few thing I didn't see before I purchased that might be helpful. The base only works if you have a 2.4ghz wifi connection and after the first introductory subscription it looks like Fi wants to charge you $99 every 6 months I think it's a little less if you buy it a year at a time, regardless the subscription is kind of pricey. There were some setup hiccups but nothing I couldn't get past. The app want full access to your phone location all the time, which isn't something I give any app access to. The bottom line is, I didn't know this subscription was going to be so expensive. I probably would not have bought this product. This caller does a lot of things a fitness watch does but a fitness watch does it without a subscription. Yes I don't expect Fi to host servers and do all those things for free but, they probably are selling any information they get off of your phones location and whatever else the app/collar collects just like everyone else does. I got the caller for $99 and they want $99 every 6 months for the service. It's going to be a hard ask for me to continue after the first 6 months.
8 people found this helpfulSending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again
Top reviews from other countries
Furb1 out of 5 starsDon't buy!!!!
Reviewed in the United Kingdom on February 16, 2026Doesn't allow you to register to a Uk phone and then have to fight for your refund despite paying £10 for registered return. 3 weeks and still waiting.
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Rusting water trough.5 out of 5 starsGreat smart collar
Reviewed in Canada on December 15, 2025Great collar. Easy to use app. Low profile.
5 out of 5 starsGreat smart collar
Reviewed in Canada on December 15, 2025Great collar. Easy to use app. Low profile.
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Nick G.1 out of 5 starsDOESN'T WORK IN THE UK
Reviewed in the United Kingdom on January 31, 2026It doesn't work in the UK
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Maud Peters1 out of 5 starsTerrible!!!
Reviewed in Canada on March 21, 2026I was excited to try this collar on my foster dog who likes to roam further than he should. After setting up safe zones and following set up instructions, we went for a walk to check how it works. Sure enough, pup took off and disappeared for 20 minutes. The "Lost Mode", which is supposed track in real time, dis not activate for 4 minutes. When it did, it showed my dog being located in the same spot where the lost mode was activated for the entire duration of him being gone. It only updated his location when he returned and the collar was next to my phone. Absolutely terrible! It defeats the whole purpose of the tracker. To add, cell service was fine. The app was able to track my phone location in real time...just not the collar/dog location. I will be returning the collar.
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William4 out of 5 starsGood purchase
Reviewed in Canada on December 5, 2025So far so good but sometime the gps is not a bit slow and not a accuret but everything else is amazing
4 out of 5 starsGood purchase
Reviewed in Canada on December 5, 2025So far so good but sometime the gps is not a bit slow and not a accuret but everything else is amazing
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Product summary presents key product information
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Product Summary: Fi New Series 3+ Smart Dog Tracker Collar [6 Month Membership Included] GPS Tracker for Dogs with Health & Behavior Monitoring, Escape Alerts, Waterproof, LED, Apple Watch Compatible (Blue, Large)
From Fi
About this Item
- NEXT-GEN GPS DOG TRACKER: The Fi Series 3+ collar is our most accurate and reliable smart collar—featuring 2x improved GPS performance from past devices to track your dog’s real-time location, nationwide, with no range limits using the Fi app.
- ESCAPE ALERTS: Custom virtual fences use the Fi app to alert you the instant your dog leaves a safe zone. If your dog escapes, get real-time notifications from your GPS dog tracker every few seconds as your dog roams.
- 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. Review all your dog’s health and behavior data right in the Fi app.
- APPLE WATCH INTEGRATION + ANDROID & IPHONE COMPATIBLE: View live location, activity, and Lost Mode from your Apple Watch. Plus, ask the built-in AI Companion anything—from behavior questions to care tips from your smartphone. This dog tracker delivers personalized reminders for vet visits, vaccines, and more through the Fi app.
- SMART VET RECORDS: Never lose track of your dog’s medical history. Add vet receipts, pet insurance, vaccine records, training certificates, and other important health documents in the Fi app to help organize, summarize, and store the documents—all in one place.
Product Description
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