Fi Series 3 Smart Dog Collar - GPS Tracker with Long Battery Life

In this review of the Fi Series 3 Smart Dog Collar the bottom line is simple: this is for owners who want reliable, nationwide GPS and long battery life to protect an active dog. The Series 3 combines always-on GPS tracking, activity and sleep monitoring, and escape alerts into a single waterproof device with a durable, dog-forward design. Setup is straightforward via the Fi app on iOS or Android, and the included six month membership gives you the tools and service needed to begin tracking and understanding a dog's movement and health right away.

Key Features

• Live GPS tracking: Precision GPS monitoring works nationwide with no maximum range so owners can locate a dog even if it travels far from home.
• Escape alerts: Lost Dog Mode triggers when a dog leaves a designated area, helping save time when a pet gets out and simplifying the search.
• Health and activity insights: The collar tracks activity, sleep, and behavior and presents that data in the app so owners can spot trends and manage fitness.
• Durable design: A stainless steel profile, 400-lb tug resistance, and IP68/IP66K waterproofing make the device rugged enough for many working and outdoor dogs.
• Exceptional battery life: Up to three months on a single charge with the included wireless charging base reduces fuss and frequent recharging.
• Membership and support: Six months of Fi Membership and seven day a week customer service via chat or phone are included to get started.

Who It's For

The Series 3 is best for active dog owners who want continuous location visibility and deeper context about exercise and sleep. It suits families with breeds that roam or work outdoors, and owners who value long battery life so the tracker stays on duty for weeks to months between charges.

Owners of very small toy breeds should check sizing carefully, and those who only need short-range proximity tracking or an ultra-compact tag might find simpler, lower-cost options more appropriate. The Fi system is built around a membership and app experience, so buyers unwilling to use a subscription service may want to consider alternatives.

Pros & Cons

Pros

• Reliable nationwide GPS tracking that does not rely on nearby smartphones.
• Long battery life that can last up to three months, reducing interruptions for charging.
• Strong build and waterproofing for outdoor activity and rough play.
• Useful activity and sleep insights that help manage a dog's fitness and health.

Cons

• Requires a Fi Membership after the included six months for continued service.
• The physical tracker adds bulk compared with tiny proximity tags, which may be a consideration for very small dogs.

Specifications

Model	Fi Series 3 Smart Dog Collar
Tracking	Live GPS, nationwide coverage
Waterproof rating	IP68 and IP66K
Battery life	Up to 3 months per charge
Tug resistance	400-lb
App	Available on iOS and Android
Membership	6 month membership included

Our Verdict

The Fi Series 3 is a strong choice for owners who need dependable, nationwide GPS tracking and long battery life in a rugged package. Its activity and sleep monitoring add ongoing value for keeping a dog healthy, and the included membership and support make setup and early use hassle-free. For active dogs and owners who want peace of mind, it is well worth the investment.

Frequently Asked Questions

Does the collar work everywhere?
The Series 3 uses GPS with nationwide coverage so it can locate a dog across large distances rather than relying on nearby phones.

How long does the battery last?
Fi advertises up to three months of battery life on a single charge when used with the included wireless charging base; real life will vary with use and settings.

Is the tracker waterproof for swimming?
The device is rated IP68 and IP66K, making it suitable for wet conditions and many water exposures, but always rinse and dry after heavy use in salt or muddy water.