Pet Supplies · Head-to-head
Tractive DOG 6 vs Fi Series 3+
Which should you buy? Our verdict on both, pulled from our full Best Dog GPS Trackers: Which One Actually Finds Your Dog comparison.
The Tractive DOG 6 wins for most owners by pairing unlimited cellular tracking and health data with the lowest ongoing cost. The Fi Series 3+ is the runner-up and the better call for escape artists, trading a heavier subscription commitment for the longest battery and toughest hardware.
Tractive DOG 6
Buy itUnlimited cellular tracking and health data at the lowest ongoing cost, the sensible default for most dogs.
- Virtual Fence geofencing with escape alerts over worldwide LTE
- Activity, sleep, and heart-rate monitoring in one collar
- Lowest subscription tier of the cellular trackers here
- Around two-week battery life means frequent charging
- Inert without a paid plan, and bulky on a small dog's neck
Fi Series 3+
Buy itThe longest battery and toughest build here, aimed squarely at escape artists, if you accept the membership lock-in.
- Longest battery life here, up to 3 months per charge
- Chew-resistant module with Lost Mode and community Search Party
- Membership is mandatory and adds a one-time activation fee
- Best pricing requires a multi-year commitment that locks you in
Side by side
The 6 criteria below are the ones our full comparison judged every product on, narrowed to these two.
| Tractive DOG 6 Our pick | Fi Series 3+ | |
|---|---|---|
| Our verdict | Buy | Buy |
| Best for | Everyday urban and suburban dogs whose owners want low running costs. | Escape-prone or hard-charging dogs, and owners who hate frequent charging. |
| Price tier | $ · budget | $$$ · premium |
| Location technology | GPS + LTE cellular | GPS + LTE + Bluetooth |
| Live-tracking range | Unlimited with cell signal | Unlimited with cell signal |
| Battery life | About two weeks | Up to 3 months |
| Health & activity tracking | Activity, sleep, heart rate | Activity, sleep, behavior cues |
| Ongoing subscription | Required, low monthly plan | Required, premium plan + activation |
| Best environment | Everyday urban and suburban | Escape artists, active dogs |
Which one is right for you?
Pick the Tractive DOG 6 if
everyday urban and suburban dogs whose owners want low running costs.
Know before buying: around two-week battery life means frequent charging.
Pick the Fi Series 3+ if
escape-prone or hard-charging dogs, and owners who hate frequent charging.
Know before buying: membership is mandatory and adds a one-time activation fee.
The bottom line
Our overall pick is the Tractive DOG 6 - Unlimited cellular tracking and health data at the lowest ongoing cost, the sensible default for most dogs. Choose the Fi Series 3+ instead if escape-prone or hard-charging dogs, and owners who hate frequent charging.
Want the full picture, including the other options we compared and the popular one we'd skip? Read the complete Best Dog GPS Trackers: Which One Actually Finds Your Dog.