Fi Series 3

Affiliate Disclosure: Smart Pet Gear Lab is reader-supported. Links in this article may be affiliate links — if you purchase through them, we earn a small commission at no extra cost to you. This never affects our recommendations. See our full Affiliate Disclosure. The pet wearable market exploded in 2026, driven by 45.3% growth in health monitoring devices. But here’s what most reviews won’t tell you: most “health tracking” collars are actually just glorified pedometers. True health monitoring requires sensors that track vital signs, not just steps. ...

Affiliate Disclosure: Smart Pet Gear Lab is reader-supported. Links in this article may be affiliate links — if you purchase through them, we earn a small commission at no extra cost to you. This never affects our recommendations. See our full Affiliate Disclosure. Pricing Note: Prices shown are approximate and may change. Always check the retailer for current pricing. Last verified: April 2026. The Fi Series 3 is one of the most popular GPS dog collars on the market, and for good reason. It packs real-time GPS tracking, activity monitoring, sleep tracking, and escape alerts into a surprisingly sleek package. But at $19/month for the subscription (on top of the collar cost), is it actually worth it? ...

Affiliate Disclosure: Smart Pet Gear Lab is reader-supported. Links in this article may be affiliate links — if you purchase through them, we earn a small commission at no extra cost to you. This never affects our recommendations. See our full Affiliate Disclosure. Pricing Note: Prices shown are approximate and may change. Always check the retailer for current pricing. Last verified: April 2026. The Whistle Switch and Fi Series 3 are the two best GPS dog trackers you can buy right now. Both track location, monitor activity, and require a monthly subscription. But they take different approaches, and which one’s better depends on what matters most to you. ...

Affiliate Disclosure: Smart Pet Gear Lab is reader-supported. Links in this article may be affiliate links — if you purchase through them, we earn a small commission at no extra cost to you. This never affects our recommendations. See our full Affiliate Disclosure. Pricing Note: Prices shown are approximate and may change. Always check the retailer for current pricing. Last verified: June 2026. Your dog can’t tell you when something feels off — they can’t describe a dull ache, flag a change in their resting heart rate, or mention that they’ve been sleeping more than usual. By the time you notice something’s wrong, it’s often been wrong for weeks. ...