Pet tech is going crazy, and dog people are more worried than ever about products that keep their dogs safe, healthy, and connected. One such product leading the pack in 2025 is the Fi Series 3 Smart Dog Collar. If you’re considering upgrading from an older device or buying a first smart collar, this review has you covered—features, advantages, real-world performance, and whether it’s worth the price.
What Is the Fi Series 3 Smart Dog Collar?
Basically, the Fi Series 3 Smart Dog Collar is an LTE and Wi-Fi-enabled collar with GPS that allows you to track your dog’s activity and location in real time. It’s not like a regular collar; it’s more like a pet wearable—a pet Apple Watch, if you prefer.
Top features in 2025 are:
- GPS tracking with LTE-M coverage across the country.
- Improved durability with stronger materials and water resistance.
- Improved battery life compared to the Fi Series 2.
- Monitoring of activity and sleep to monitor health and fitness goals.
- Escape alerts reported directly to your phone.
What’s New in the 2025 Model?
The Fi Series 3 made a splash when it first released, but after being outfitted with software and firmware updates in 2025, it’s smarter still. Some of the greatest improvements are:
- Quicker GPS refresh rate: More precise location updates reduce lag when tracking a running pet.
- Enhanced cellular range: LTE-M now supports more carriers, delivering better coverage in the countryside.
- Deeper health insights: The collar doesn’t just track activity; it tracks sleep, restlessness, and long-term trends that can indicate health issues.
- Tougher build: The 2025 employs mil-spec aluminum hardware, which is chew-proof.
How the Fi Series 3 Smart Dog Collar Works
The collar talks to three major systems:
- GPS satellites to receive accurate location data.
- LTE-M cellular networks to send that location to your phone through the Fi app.
- Wi-Fi and Bluetooth for greater indoor precision and battery life.
When your dog is home, the collar pairs with your Wi-Fi or Fi base station. If your pup ventures out of your specified “safe zone,” the collar reverts to GPS + LTE-M and sends an alert immediately.
Why Dog Owners Love the Fi Series 3
1. Peace of Mind
The biggest selling point is that you will always be able to locate your dog. If your gate had been left open or your dog had managed to slip free from a leash, the Fi Series 3 Smart Dog Collar informs you instantly.
2. Long Battery Life
Smart collars have the reputation for draining rapidly, yet Fi beats the competition. Depending upon your settings, the Series 3 will last up to three months on a single charge.
3. Health Monitoring
More owners use the Fi app as a fitness tracker in 2025. You can see if your dog is achieving daily activity levels, receiving adequate sleep, or suffering from unusual sleep disruptions.
4. Rugged and Waterproof
For active dogs with love for tough play, water, or mud, the Series 3 is IP68 waterproof and built to last through saltwater, snow, and even attempts at chewing.
Setting Up the Fi Series 3
- Download the Fi app (iOS or Android).
- Charge the collar fully before first use.
- Pair it via Bluetooth and connect to Wi-Fi.
- Set up safe zones (your home, garden, or other trusted locations).
- Add emergency contacts who can also find your dog if needed.
Setup takes 15 minutes, and then everything else works automatically in the background.
Subscription Plans
The collar itself costs around $149–$199, but to unlock full GPS features, you’ll need a subscription. As of 2025, Fi offers:
- Monthly Plan: $19/month
- Annual Plan: $99/year (most popular)
- Two-Year Plan: $168 (best deal)
Without a plan, the collar still functions as a regular collar with limited activity tracking, but GPS and escape alerts require the subscription.
Fi Series 3 vs. Competitors
How is the Fi Series 3 Smart Dog Collar different from other leading smart collars of 2025?
| Feature | Fi Series 3 | Whistle Go Explore | Tractive GPS XL |
|---|---|---|---|
| Battery Life | Up to 3 months | 2–3 weeks | 2 weeks |
| Durability | Military-grade | Good | Average |
| Health Tracking | Yes | Yes | Limited |
| Price | $149–$199 + sub | $149 + sub | $129 + sub |
Fi has superior battery life and durability, with more advanced health monitoring offered by Whistle. Tractive is cheaper but not as tough.
Real-World Performance in 2025
Owners of dogs claim the Series 3 has become significantly more reliable compared to its earlier versions. Some points of praise:
- GPS accuracy: Largely within 10–20 feet.
- Escape alerts: Make it home within a minute.
- Battery claims: Meet expectations, even for super-high-energy dogs.
- Comfort: The collar is sufficiently light for small breeds but robust enough for bigger dogs.
The biggest drawback mentioned is the cost of the subscription fee, but most owners find the safety features are worth it.
Who is Fit to Buy the Fi Series 3 Smart Dog Collar?
This collar fits best:
- Escape artists: Dogs that dig, jump, or slither through fences.
- Active dogs: High-exercise dogs enjoy activity tracking.
- Pet owners in the countryside: Expanded LTE coverage supports rural Wi-Fi-weak areas.
- Tech-savvy owners: If you love data and apps, you’ll love the Fi dashboard.
It might not be necessary for dogs who never leave your side or live completely indoors, but for all others, the extra security is worth it.
Tips to Maximize Your Collar
- Charge it: Even with a battery that lasts a while, check it on a weekly basis.
- Set multiple safe places: Add your office or a sitter’s place.
- Monitor trends: Employ health reports to identify incipient symptoms of illness.
- Update firmware: Timely updates maintain sharp performance.
Where to Buy the Fi Series 3 Smart Dog Collar
You can find the Fi Series 3 Smart Dog Collar directly on Amazon, which offers fast delivery, easy returns, and plenty of customer reviews to guide your choice. The collar is available in multiple colors to match your dog’s personality and style, including:
- Gray – a sleek, neutral look for dogs that keep it classic.
- Blue – bold and vibrant, perfect for active pups.
- Yellow – bright and cheerful, easy to spot outdoors.
- Pink – fun and stylish for a playful edge.
When ordering, make sure to select the right size and color so your dog gets the best fit and look.
👉 Check the latest price and availability on Amazon
Last Word: Is the Fi Series 3 Worth It in 2025?
Yes—if peace of mind and safety are important. The Fi Series 3 Smart Dog Collar stands out with its unmatched battery life, rugged build, and precise GPS notifications. The subscription fee is another expense, but with how fast it can find a missing dog, it’s more like insurance than a luxury.
For pet owners in 2025, this collar is not just an appliance—it’s a tool that increases your bond with your pet by making them secure every day.