Fi Smart Dog Collar Series 3+ (Gray, Small) - GPS Tracking & Fitness

Our review of the Fi Collar Series 3+ (Gray, Small) finds it best suited for owners who want a durable, connected collar that prioritizes real-time location and health insight. The single biggest reason to buy is the upgraded GPS performance: Fi states the Series 3+ offers roughly two times improved GPS accuracy and faster locating, which means greater confidence when a curious dog slips a fence or wanders on a hike. This review focuses on tracking reliability, daily activity monitoring, and the collar's build for active dogs.

Key Features

• Improved GPS: The upgraded antennae deliver faster, more reliable nationwide real-time tracking so owners can locate a dog without range limits.
• Lost Dog Mode: Instant escape alerts and a dedicated Lost Dog Mode help owners react quickly and coordinate a search when a dog goes missing.
• Activity & Health Monitoring: AI-powered insights track activity, rest, barking, scratching, and eating to offer a fuller picture of a dog's wellbeing.
• Durable Design: IP68 waterproofing and 400 lb tug resistance make the collar ready for swimming, rough play, and outdoor adventures.
• Long Battery Life: The collar can run up to 3 months between charges depending on usage, reducing maintenance for busy owners.
• Integrated Records & Companion: Stores vet records and pairs with an AI Companion plus Apple Watch integration for care reminders and quick access to health data.

Who It's For

The Fi Series 3+ is ideal for active dog owners who need dependable, nationwide GPS tracking and want ongoing health insight beyond simple steps. Small-breed owners choosing the gray small size will appreciate the collar's lighter fit combined with robust tracking and safety features.

It is less suited for owners who never travel off-grid or who prefer a basic, non-connected tag; the Fi excels when you want remote location, escape alerts, and layered health monitoring rather than just a simple ID collar.

Pros & Cons

Pros

• Very reliable real-time location thanks to improved GPS performance and upgraded antennae.
• Comprehensive health tracking with AI-generated insights and integration with Apple Watch for convenient monitoring.
• Rugged build with IP68 waterproofing and 400 lb tug resistance makes it adventure-ready.
• Long battery life and included six-month membership provide immediate access to tracking and features.

Cons

• Requires a membership after the included free period for full GPS and health services.
• Small size and feature set may be more than needed for owners seeking a simple identification collar without tracking.

Specifications

Product	Fi Collar Series 3+ (Gray, Small)
Tracking Technology	Next-gen GPS with upgraded antennae, nationwide real-time tracking
Water Resistance	IP68 waterproof
Tug Resistance	400 lb
Battery Life	Up to 3 months
Included Service	Free 6 month Fi Membership
Health Monitoring	Activity, rest, barking, scratching, eating, AI Companion

Our Verdict

The Fi Series 3+ in gray small is a smart choice for owners who want dependable nationwide GPS tracking paired with meaningful health insights and rugged durability. It represents good value for active dogs and peace of mind for owners who prioritize real-time location and long battery life, though ongoing membership fees should be considered.

Frequently Asked Questions

Does the collar work nationwide?
The Series 3+ provides nationwide real-time GPS tracking with no range limits when the service is active.

Is the collar waterproof for swimming?
Yes, the collar has IP68 waterproofing suitable for swimming and wet conditions.

How long does the battery last?
Battery life can be up to three months depending on usage and settings.