Tractive DOG 6
8.6Very good · out of 10- $79 and 1.4 oz: the cheapest and lightest tracker we compare
- Up to 2 weeks of battery with Power Saving Zones
- Clips onto the collar your dog already wears
3 criteria won · $79, $427 over 3 years
Head-to-head · US prices checked November 9, 2026
Tractive DOG 6 vs Fi Series 3+
Of 4 decided criteria, the Tractive DOG 6 wins 3 and the Fi Series 3+ wins 1, on official specs and plan prices.
Fi Series 3+
8.3Good · out of 10- Up to 3 months between charges, the longest of any device we compare
- IP68 waterproof and rated for 500+ lb of pull
- Escape alerts only: it does not stop your dog at a boundary
1 criterion won · $129, $657 over 3 years
Short answer: pick the Tractive DOG 6 ($79) to spend less, about $427 against $657 over three years, on a 1.4 oz tracker. Pick the Fi Series 3+ ($129) if you hate charging: up to 3 months per charge against up to 2 weeks, in a tough IP68 collar rated for 500+ lb of pull. Neither one keeps your dog in a yard: both send escape alerts.
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Criterion by criterion
The better stated figure on each line is highlighted (4 lines can be compared); if either maker does not state a value, the line is left undecided. The 3-year cost adds 36 months of plan at the cheapest billing cycle, at US prices checked on November 9, 2026.
| Criterion | Tractive DOG 6 | Fi Series 3+ |
|---|---|---|
| Calculated scoreBetter: the highest | 8.6/10 | 8.3/10 |
| Device priceBetter: the lowest | $79 | $129 |
| 3-year costBetter: the lowest | $427 | $657 |
| Subscription | Required, from $6/mo | Required, from $14.13/mo |
| Type | GPS dog tracker | GPS dog tracker |
| Containment | Escape alerts only | Escape alerts only |
| Fences | Virtual fences with escape alerts (no cue to the dog) | Safe zones with escape alerts (no cue to the dog) |
| GPS hardware | Single-frequency | Single-frequency |
| Live tracking | Live, cellular | Live, cellular |
| Battery lifeBetter: the longest | 14 days | 90 days |
| Boundary cues | No cues (alerts to your phone) | No cues (alerts to your phone) |
| Smallest dog | 8.8 lb | Not stated |
| Neck size | Clips on collars up to 1.1 in wide | XS band for dogs under 10 lb (9.5-11 in) up to XL (20-31 in) |
| Water resistance | IP68 | IP68 and IP66K, salt water tested |
| Warranty | Not stated | 1 year |
| Return window | 30 days | 30 days |
What the numbers mean
Both are cellular trackers with required plans. Tractive bills $144 a year, $204 for two years or $360 for five ("starting from", may vary by location); Fi bills $99 for 6 months, $189 a year or $339 for two years, with a 6-month minimum.
Tractive clips onto the collar your dog already wears (up to 1.1 in wide) and is rated from 8.8 lb. Fi replaces the collar, in sizes from XS (dogs under 10 lb) to XL, and adds a base that charges it and boosts the signal at home.
Our pick for each kind of owner
The right choice depends on your dog, your yard and the monthly bill you accept. Here is who should buy which.
Tight budget
Tractive DOG 6
Over three years the Tractive DOG 6 costs $427 against $657 for the Fi Series 3+, device and plan included, at prices checked on November 9, 2026.
Read the review ↗Best overall score
Tractive DOG 6
Tractive DOG 6 scores 8.6/10 against 8.3/10 overall: the better all-rounder.
Read the review ↗Fewer charges
Fi Series 3+
Fi states 90 days per charge for the Fi Series 3+, against 14 days for the Tractive DOG 6.
Read the review ↗Frequently asked questions
Which is better, the Tractive DOG 6 or the Fi Series 3+?
The Tractive DOG 6 for most owners: it scores higher overall (8.6 vs 8.3/10). Your yard and your dog can still flip it: see the picks by profile on this page.
Do the Tractive DOG 6 and the Fi Series 3+ need a subscription?
The Tractive DOG 6 needs a Tractive subscription (from $6/mo). The Fi Series 3+ needs a Fi Membership (from $14.13/mo). Plan prices as of November 9, 2026.
Which one costs less over three years?
The Tractive DOG 6: $427 against $657 over 36 months, device and plan included, at the cheapest published billing cycle. Try your own numbers in the [3-year cost calculator](/tools/gps-dog-fence-cost-calculator/).
Which one suits a small dog?
The Tractive DOG 6 is rated for dogs from 8.8 lb. Fi gives a neck range (XS band for dogs under 10 lb (9.5-11 in) up to XL (20-31 in)) rather than a minimum weight for the Fi Series 3+.