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  • 6 VIDEOS
  • 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)
  • Fi Series 3+Fi Dogs

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)

4.0 out of 5 stars (833)
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Color: Blue
Size: Large

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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

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.

Fi Series 3+

Merchant Video
Cover s3+
dek 2 3+

Fi GPS Trackers

Fi Series 3+ Pink 12 MN

Fi Mini Small Dogs 12 MN

Fi Mini Cats 12 MN

Fi Series 3+ Blue 12 MN

Fi Series 3+ Yellow 12 MN

Fi Series 3+ Gray 12 MN

Customer Reviews
4.1 out of 5 stars 1,252
3.6 out of 5 stars 123
3.5 out of 5 stars 64
4.1 out of 5 stars 1,252
4.1 out of 5 stars 1,252
4.1 out of 5 stars 1,252
Location
GPS & LTE tracking GPS & LTE tracking GPS & LTE tracking GPS & LTE tracking GPS & LTE tracking GPS & LTE tracking
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
Charging
Wireless charging base Easy USB-C charging Easy USB-C charging Wireless charging base Wireless charging base Wireless charging base
Hardware
Customizable night light 0.56 oz 0.56 oz Customizable night light Customizable night light Customizable night light
Waterproof
Waterproof (IP68/66K) Waterproof (IP68) Waterproof (IP68) Waterproof (IP68/66K) Waterproof (IP68/66K) Waterproof (IP68/66K)
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)
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
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
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
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
desk 9
7 .2
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Product information

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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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What's in the box

  • Charger
  • USB Cable
  • Customer reviews

    4 out of 5 stars
    833 global ratings

    Customers say

    Customers find the dog tracker collar excellent, easy to set up and use, and appreciate its amazing battery life that charges in 20-30 minutes to full. The GPS tracking keeps good track of pets, and customers value the peace of mind it provides. The functionality and accuracy receive mixed reviews - while some say it works great, others report it doesn't work well, and while some find the GPS accurate, others find it unreliable. Value for money opinions are divided, with some considering it well worth the cost while others say it's not worth the expense.
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    127 customers mention collar, 115 positive, 12 negative
    Customers love the collar, describing it as excellent and a great choice.
    Great product, easy to set up and use, use this on my deaf farm dog daily definitely going to get 3 more for my other dogsRead more
    Great collar! Gives us peace of mind when we are away! We love tracking her activity and rest as well as the distance of our walks.Read more
    excellent product. perfect for my Siberian Husky pup. Charge lasts forever as I’ve only charged it once in 2 months. App installed easily too....Read more
    I really love the Fi collar I do wish it beeped like an air tag but totally worth it and the battery last a good long time as well, true to size I...Read more
    105 customers mention gps tracking, 90 positive, 15 negative
    Customers appreciate the GPS tracking capabilities of the collar, which keeps good track of their dogs and allows them to monitor activity, rest, and steps.
    This is the perfect tracker for your dog! It is gps and has signal nearly everywhere!...Read more
    Living in New York City, we’ve come to really rely on the GPS tracking feature to keep an eye on our dog during off-leash mornings in Central Park....Read more
    ...With the help of this collar and its live tracking feature we caught her in 30 minutes.. it seems pricey to some people but for us it is well worth...Read more
    Easy set up and great tracking capabilities!Read more
    79 customers mention battery life, 58 positive, 21 negative
    Customers are satisfied with the tracker's battery life, noting that it stays charged and can be fully recharged in 20-30 minutes.
    ...Overall I am very happy with this purchase. The battery lasts a long time. It will drain faster with lost dog mode but otherwise it is sturdy....Read more
    I’m absolutely amazed by how long it stays charged. I’m on day 3 and there’s still 70% battery left. It’ll probably last a week or more....Read more
    I gave 4 stars because the battery life is not that great. I have to charge it every 5 days but the GPS tracking on this collar is excellent.Read more
    ...I highly recommend. The battery life is great and it charges quickly....Read more
    53 customers mention ease of use, 47 positive, 6 negative
    Customers find the dog tracker easy to set up and use, with the app being particularly simple to create an account with.
    ...It was easy to set up, there are a lot of settings you can turn on or off, and there are multiple "safe zones" you can set up for your dog before it...Read more
    ...Long lasting charge on both. Easy to use and track with the app. Love the ability to turn lights on the collar. Very durable.Read more
    ...The charge lasts a long time. The app is easy to use and set up on your phone. We liked it so much that we bought a second one for our new dog.Read more
    ...App is easy and fun to use. Follow other Fi dogs in the area or similar breeds on the Fi app....Read more
    42 customers mention peace of mind, 41 positive, 1 negative
    Customers find the tracker collar provides peace of mind, adding an extra layer of safety and making them feel more secure about their pets.
    ...The perfect solution for my escape artist and peace of mind. It’s waterproof and dog approved by my pup who was able to chew off her Tractive tag....Read more
    ...Even if your dog is microchipped, it’s great peace of mind if your dog is a runner or curious to be proactive in locating them....Read more
    ...A lot can happen in two minutes. But overall this gives me peace of mind when I'm away from home our far back out onto the property doing...Read more
    ...This is expensive, but a great value and great piece of mind knowing the gps would help me track down my girl if she gets lost....Read more
    122 customers mention functionality, 79 positive, 43 negative
    Customers have mixed experiences with the tracker's functionality, with some reporting it works well while others find it not working properly.
    Works great im very happy with itRead more
    Not working so great....Read more
    ...It works well and my good boy looks so handsome in it. I am grateful you make a good product because it really came through when I needed it....Read more
    Very pleased. The collar works great and provides extreme peace of mind. I live in a rural area and air tags just weren’t reliable....Read more
    68 customers mention accuracy, 47 positive, 21 negative
    Customers have mixed experiences with the tracker's accuracy, with some finding it very accurate and providing precise location information, while others report that it frequently fails to provide reliable data.
    Totally in love with this product!!!! I love how accurate and informed that it keeps me. AAA! Purchase.Read more
    This collar is a life-saver! Wish I knew about it years ago. It is VERY accurate, fast to respond & with notifications, and super customizable!...Read more
    Not accurate tracking. Dog outgrew the collar fast even with suggested sizing. Battery doesn’t last very long....Read more
    This GPS tracker is accurate and helped me to find my dog quickly. The app is easy to use and the community of other users is friendly and helpful....Read more
    65 customers mention value for money, 44 positive, 21 negative
    Customers have mixed opinions about the value for money of the dog tracker, with some finding it well worth the investment while others consider it not worth the cost.
    ...Best money I have ever spent…..worth every penny. Great app and so easy to set up and use. Very accurateRead more
    ...love the Fi collar I do wish it beeped like an air tag but totally worth it and the battery last a good long time as well, true to size I do wish it...Read more
    Not worth the money. This collar is very inaccurate. Our pet wondered off and the location showed at one spot....Read more
    Worth the moneyRead more
    The most safety you’ll ever feel!
    5 out of 5 stars
    The most safety you’ll ever feel!
    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.
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    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, 2026
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      We 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 helpful
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    • 5 out of 5 stars
      Stupid small price for risk reduction!
      Reviewed in the United States on April 2, 2026
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      I 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??

      Stupid small price for risk reduction!
      Stupid small price for risk reduction!
      5 out of 5 stars
      Stupid small price for risk reduction!
      Reviewed in the United States on April 2, 2026

      I 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 helpful
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    • 1 out of 5 stars
      Read the reviews before you buy
      Reviewed in the United States on April 22, 2026
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      Dont 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 helpful
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    • 5 out of 5 stars
      Peace of mind
      Reviewed in the United States on May 25, 2026
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      A 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 helpful
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    • 4 out of 5 stars
      Great after the actually work
      Reviewed in the United States on April 25, 2026
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      When 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 helpful
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    • 5 out of 5 stars
      Best money I have spent for peace of mind
      Reviewed in the United States on March 2, 2026
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      We 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 helpful
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    • 5 out of 5 stars
      The most safety you’ll ever feel!
      Reviewed in the United States on April 28, 2026
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      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.

      The most safety you’ll ever feel!
      5 out of 5 stars
      The most safety you’ll ever feel!
      Reviewed in the United States on April 28, 2026

      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 helpful
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    • 3 out of 5 stars
      Some things you might want to know before you buy.
      Reviewed in the United States on May 22, 2026
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      So 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 helpful
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    Top reviews from other countries

    • 1 out of 5 stars
      Don't buy!!!!
      Reviewed in the United Kingdom on February 16, 2026
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      Doesn'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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    • 5 out of 5 stars
      Great smart collar
      Reviewed in Canada on December 15, 2025
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      Great collar. Easy to use app. Low profile.

      Great smart collar
      5 out of 5 stars
      Great smart collar
      Reviewed in Canada on December 15, 2025

      Great collar. Easy to use app. Low profile.

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    • 1 out of 5 stars
      DOESN'T WORK IN THE UK
      Reviewed in the United Kingdom on January 31, 2026
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      It doesn't work in the UK

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    • 1 out of 5 stars
      Terrible!!!
      Reviewed in Canada on March 21, 2026
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      I 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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    • 4 out of 5 stars
      Good purchase
      Reviewed in Canada on December 5, 2025
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      So far so good but sometime the gps is not a bit slow and not a accuret but everything else is amazing

      Good purchase
      4 out of 5 stars
      Good purchase
      Reviewed in Canada on December 5, 2025

      So 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: 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

    4.0 out of 5 stars, 833 ratings

    Customer reviews

    200+ bought in past month

    Price

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    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

    Advanced GPS and escape alerts in a small adaptable design — smart pet parenting starts with Fi Mini, the essential safety tracker. Compatible with any collar or harness, Fi Mini provides maximum protection for small dogs and adventurous cats alike. And with added activity and sleep tracking, you can have even more peace of mind taking on life’s adventures in lock-step.

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