Fi Series 3+ Smart GPS Dog Collar (Medium)
Real-time GPS, virtual fences and escape alerts with up to 3 months of battery: the Fi Series 3+ is the smart collar 2026 reviews keep picking.
Our Verdict
A GPS/LTE smart collar with real-time location, virtual geofencing with escape alerts, health and activity monitoring, IP68 waterproofing and an LED light. Membership required for GPS features.
What We Like
- Real-time nationwide LTE-M GPS tracking
- Virtual fences with instant escape alerts
- Health and activity monitoring
- Up to 3-month battery life
- IP68 waterproof, LED light, Apple Watch app
Worth Knowing
- Monthly membership required for GPS/alerts
- Collar size must match the dog
- GPS accuracy varies in bad coverage
- Not a training/anti-bark collar
Who Is This For?
Dog owners who hike, travel or worry about their dog slipping the yard — anyone who wants to know where the dog is.
The Full Picture
The Series 3+ doubled GPS accuracy over the Series 3 and adds AI behavior insights. Set a fence around home or the park, and the app alerts within seconds of an escape. The 3-month battery means you charge it a few times a year, not weekly.
Bottom Line
The best smart dog collar of 2026 — real-time GPS, escape alerts, months of battery.