Fi Smart Dog Collar (Series 3) vs Whistle GO Explore GPS Pet Tracker
We compare the Fi Smart Dog Collar (Series 3) and Whistle GO Explore GPS Pet Tracker head-to-head on performance, features, value, and more. Here's which one wins.
Fi Smart Dog Collar (Series 3)
Scored 9.3/10 in our testing
Fi Smart Dog Collar (Series 3)
Best GPS dog collar with built-in tracker, 3-month battery life, and LTE + Wi-Fi + Bluetooth triple connectivity
Whistle GO Explore GPS Pet Tracker
Best health-focused GPS tracker with wellness scoring, licking/scratching detection, and vet-shareable reports
Score Breakdown
| Fi Smart Dog Collar (Series 3) | Category | Whistle GO Explore GPS Pet Tracker |
|---|---|---|
| 9.5/10 ✓ | Performance | 9/10 |
| 9.5/10 | Features | 9.5/10 |
| 9.3/10 ✓ | Ease of Use | 9/10 |
| 8.5/10 | Value | 8.5/10 |
| 9.3/10 ✓ | Overall | 9/10 |
Specs Comparison
| Fi Smart Dog Collar (Series 3) | Spec | Whistle GO Explore GPS Pet Tracker |
|---|---|---|
| True GPS with LTE cellular | GPS | True GPS with AT&T LTE |
| Up to 3 months — longest available | Battery | Wellness score — eating, drinking, licking, scratching |
| LTE + Wi-Fi + Bluetooth | Connectivity | Behavior change detection |
| Customizable safe zones with alerts | Geofence | Up to 20 days |
| Step counter and activity tracking | Activity | Vet-shareable health reports |
Fi Smart Dog Collar (Series 3)
Pros
- + Built into collar — no dangling tag
- + 3-month battery — longest available
- + Triple connectivity — smart power management
- + Instant geofence escape alerts
Cons
- − Monthly subscription required ($8-13/month)
- − Collar design limits style choices
- − GPS accuracy slightly below Tractive in dense areas
Whistle GO Explore GPS Pet Tracker
Pros
- + Licking and scratching behavior detection
- + Wellness scoring with health reports
- + Vet-shareable reports — objective health data
- + 20-day battery life
Cons
- − Monthly subscription required ($10-13/month)
- − AT&T network only — no worldwide coverage
- − Health features require subscription tier
Our Verdict
Based on our scoring, the Fi Smart Dog Collar (Series 3) comes out on top with an overall score of 9.3/10. The Fi Smart Dog Collar integrates the GPS tracker directly into the collar — no dangling tag that can snag or fall off. The 3-month battery life is the longest of any GPS pet tracker, achieved through intelligent power management: the collar uses low-power Bluetooth when at home (Wi-Fi safe zone), switches to Wi-Fi for moderate accuracy outside, and activates LTE GPS only when the dog leaves the safe zone or during walks. This triple-connectivity approach means the battery is not constantly burning through GPS. Geofence alerts arrive within seconds when your dog escapes. Activity tracking counts steps and provides daily activity scores. The subscription is required but reasonable. For dog owners who want always-on GPS tracking with minimal maintenance, the Fi collar is the best dedicated solution.
Buy the Fi Smart Dog Collar (Series 3) on AmazonRead the full Best GPS Pet Trackers 2026 guide for complete reviews of all 4 products.