Fi vs. Tractive DOG 6

Specifications side by side

Every figure below comes from the manufacturer’s own published specifications.

Where Fi is stronger

• Less than half the weight

  Fi Mini is 16 g (0.56 oz) against 40 g (1.4 oz) for the DOG 6 — the difference you notice on a small dog or a cat.

• Months between charges, not days

  Up to 2 months on Fi Mini against up to 14 days on the DOG 6 with Power Saving Zones enabled, or up to 6 days without.

• Behaviour, not just activity

  Fi Mini detects barking, scratching, licking, eating and drinking alongside activity and sleep, and keeps AI vet records.

Common questions

Is Fi Mini or the Tractive DOG 6 better for a small dog or a cat?

Fi Mini, on size and weight. It is 16 g (0.56 oz) against the DOG 6’s 40 g (1.4 oz), and 42 × 30 × 12.5 mm (1.65 × 1.18 × 0.49 in) against 71 × 28 × 18 mm (2.8 × 1.1 × 0.7 in) — about 56% smaller by volume. It also attaches to a collar or harness you already own, which matters if your cat wears a breakaway collar. The DOG 6 is the wider-coverage device if you travel outside Fi’s 35 countries.

Which one lasts longer between charges?

Fi Mini, by a wide margin on the published figures: up to 2 months against up to 14 days for the DOG 6 with Power Saving Zones enabled, or up to 6 days without them. Power Saving Zones work by reducing tracking frequency inside places you mark as safe, so the 14-day figure assumes your dog spends most of its time in one.

Which is cheaper over the first year?

They are close enough that price should not decide it. A Tractive DOG 6 is about $187 for the first year — $79 for the device plus $108 for the annual plan — against $189 for Fi’s one-year membership with the device included.

Can I try either one before committing?

Fi offers a 30-day risk-free trial. Tractive publishes a 30-day money-back guarantee, which works differently — you buy the device and return it for a refund within 30 days.

Does Fi Mini work outside the United States?

Yes. Fi Mini works across North America and much of Europe — 35 countries and territories, including Canada, Mexico, Puerto Rico, the United Kingdom, Ireland, France, Germany, Spain, Portugal, the Nordics, Switzerland and Turkey. Tractive’s footprint is wider again at 175+ countries, so for travel well beyond Europe and North America it is the safer choice.

Do both need a subscription?

Yes. Both use a cellular connection for live tracking, and neither offers live GPS without an ongoing plan.

I have a large dog — is this the right comparison?

It depends on your preference. Tractive sells a bigger model, the DOG 6 XL, which it lists as “only for dogs above 44 lbs” — about 20 kg — and Fi’s equivalent is the Series 3+ rather than the Mini. See Fi vs. Tractive DOG 6 XL for that pairing.

Do Tractive’s health features actually work in practice?

Our experience is that the claims are overstated. Across the dogs we have tested a Tractive tracker on, we have not been able to get heart rate, respiratory rate or bark detection to produce readings we would rely on. That is hands-on testing rather than a controlled study, and your result may differ — but it was consistent enough that we think anyone buying for those features should know before paying for them. Tractive’s own page conditions heart and respiratory rate on the dog “sleeping or resting” and states that Tractive “is not a medical device”.

What Fi owners say

• Worth every single penny I paid for them and then some!

  Tommy’s Dog Dad

• I’ve had every version of the Fi collar, and it just keeps getting better!

  Lola’s Dog Mom

• We’re loyal to him because he’s loyal to us and he’s a part of our family… there’s no other better technology available.

  Poppy’s Dog Dad