Fi series3+

Meet the world's smartest dog collar. GPS tracking & Al-powered health monitoring.

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Unleashed by AI

Instantly know where they are, how they're doing and what they need to feel their best.

Track Everything with Fi Series 3+

  • Activity + Rest

    Hit breed-based fitness goals and catch changes in typical activity and rest patterns.

  • Eating + Drinking

    Spot meaningful shifts in appetite and thirst to stay a step ahead of potential health issues.

  • Licking + Scratching

    Keep tabs on your dog's skin health to spot signs of irritation and discomfort early on.

  • Barking

    Get notified of unusually vocal or quiet days to address any stressors in their environment.

    Key Features

    Live GPS Tracking
    Real-time, nationwide GPS with instant escape alerts.

    Health & Behavior Insights
    Tracks activity, sleep, and daily habits automatically.

    Smart App Control
    View location, stats, and share access in one app.

    Apple Watch Ready
    Check location and alerts right from your wrist.

    Rugged & Waterproof
    Built tough for rain, mud, and everyday adventures.

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    268,326lost dogs found

    Enjoy total peace of mind with award-winning live GPS tracking that’s faster than ever before.

    Microchips don’t track

    Chipped dogs need to be safely brought to animal control or a vet for scanning. Fi always knows where they are.

    AirTags aren’t meant for dogs

    Limited waterproofing and short-range iPhone tracking fall short. Fi uses GPS to track your dog—no matter how far.

    Know the difference. Track with confidence.

    Not all trackers measure up. Fi gives real-time GPS tracking with no guesswork or gaps.

     

    Fi — The Ultimate Smart Dog Collar

    Keep your dog safe. Know where they are. Understand how they live.

    FAQ

    Does the Fi Smart Collar use GPS or Bluetooth?

    The Fi collar uses GPS combined with LTE-M cellular technology, not just Bluetooth. This allows real-time tracking anywhere nationwide.

    How accurate is the GPS tracking?

    Fi provides highly accurate location tracking, typically within a few feet in open outdoor areas.

    How long does the battery last?

    The battery lasts up to 3 months on a single charge, depending on usage and signal strength.

    Is the collar waterproof?

    Yes. The Fi Series 3+ is fully waterproof and designed to handle rain, swimming, and mud.

    What dog sizes is this collar suitable for?

    The collar is available in multiple sizes. XL fits neck sizes approximately 20”–31”, ideal for large breeds.

    Can I track my dog in real time if they escape?

    Yes. Once your dog leaves a Safe Zone, Lost Dog Mode activates and updates location every few seconds.

    Does the collar track health or behavior?

    Yes. The collar tracks daily activity, sleep patterns, and behaviors such as walking and resting to help you monitor wellness.

    Can multiple people access the same collar?

    Yes. You can share access with family members or dog walkers through the Fi app.

    Does the collar work with an Apple Watch?

    Yes. Fi offers Apple Watch integration, allowing you to check your dog’s location and activity on your wrist.

    Is the collar comfortable for dogs to wear all day?

    Absolutely. The collar is lightweight, smooth, and designed for all-day comfort.

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