ConsFirst / Pet GPS trackers / Compare
Fi Series 3+ Smart Dog Collar vs Tractive Cat 6 Mini
Which one has the downsides you can live with?
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The short answer
Fi Series 3+ Smart Dog Collar ranks higher (#1 vs #4 of 7) and scores better on battery life, fit & durability. Tractive Cat 6 Mini wins on location accuracy, app & alerts, ongoing cost.
The biggest complaint about the Fi Series 3+ Smart Dog Collar is needs its own collar, which can rattle; for the Tractive Cat 6 Mini it's short battery life. Pick the one whose catch bothers you less.
Side by side
| Fi Series 3+ Smart Dog Collar | Tractive Cat 6 Mini | |
|---|---|---|
| Rank in pet gps trackers | #1 | #4 |
| Price tier | $$ | $$ |
| Type | GPS + cellular | GPS + cellular |
| Amazon 1–2★ share | 15% | 24% |
| Overall score | 3.9 | 3.5 |
| Location accuracy | 4.0 | 4.5 |
| Battery life | 4.5 | 2.0 |
| App & alerts | 3.5 | 4.0 |
| Ongoing cost | 3.0 | 4.0 |
| Fit & durability | 4.5 | 3.0 |
Price tiers: $ under $50 · $$ $50–200 · $$$ over $200 (device only, before the plan). Highlighted = clearly better (a score gap of 0.3 or more, or a 1–2★ share at least 3 points lower). Scores are explained, with sources, on each product's page.
Top complaints
Fi Series 3+ Smart Dog Collar
- Needs its own collar, which can rattle
It attaches only to collars with Fi's proprietary endlinks. Wirecutter says some users, including one long-term tester, complain about the metal endlinks clicking or rattling.
Source: Wirecutter (GPS pet trackers) - Goes offline; zigzag paths
Wirecutter saw the tracker go offline or fail to connect more often than Tractive's, and its live path sometimes zigzagged through buildings. It also works better if the app stays open in the background.
Source: Wirecutter (GPS pet trackers) - Mixed accuracy and battery for owners
Amazon's review summary says accuracy and durability are mixed, and some owners need to charge every 5 to 6 days while others report phenomenal battery life. Some find it too expensive for what it does.
Tractive Cat 6 Mini
- Short battery life
Wirecutter's unit was completely drained after 5.5 days on an active indoor-outdoor cat, the shortest of its picks. The Fi Mini For Cats still had about 30% left after the same time. Tractive's Amazon listing claims up to 7 days.
- Bulky, with flimsy plastic
Wirecutter says it's curved to fit a cat's neck but still pretty bulky, and one buckle-release tab broke off while fitting the collar.
Source: Wirecutter (GPS pet trackers) - Proprietary charger
The charging cord uses a unique magnetic attachment that won't work with other devices (Wirecutter).
Source: Wirecutter (GPS pet trackers)
Who should pick which
Pick the Fi Series 3+ Smart Dog Collar if
A slim, tough tracker for active or swimming dogs
Small dogs (Fi's size chart starts at 5 lb)
Activity and behavior insights
Skip it if: You want to keep your dog's current collar; You won't leave the Fi app running in the background; You live where cell coverage is patchy
Pick the Tractive Cat 6 Mini if
Indoor-outdoor cats
Seeing where your cat roams (heat map and territory)
Spotting a hiding cat with the lights
Skip it if: You don't want to charge every few days; Your cat won't tolerate a bulky collar; Your cat stays indoors (GPS struggles indoors)
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