# Fi vs Tractive (2026): Which GPS Tracker Fits Your Dog

> Fi Series 3+ and Tractive DOG 6 compared on the makers' own specs: collar or clip-on, weight, battery, water rating, network, plans and cat options.

- Source: https://petprooflab.com/walks-travel/fi-vs-tractive-gps-collars
- Publisher: PetProofLab (https://petprooflab.com)
- Published: 2026-09-28
- Category: walks-travel
- Tags: Fi vs Tractive, Fi Series 3+, Tractive DOG 6, GPS dog collar, dog GPS tracker, Tractive cat tracker
- Method: picks chosen from Amazon listings and brand specs; not hands-on tested; current Amazon prices are on the page; content checked 2026-09-28.
- Quick answer: Choose the Fi Series 3+ if your dog wears one collar all day and spends most of its time near home: the tracker is built into the collar, and Fi rates the battery at up to three months at low activity. Choose the Tractive DOG 6 if you want a lighter clip-on unit (39 g vs Fi's 47 g) that moves between collars and harnesses, if you travel outside North America, or if you also want a cat tracker in the same app. Both need a paid plan, and both are rated IP68.

## Key takeaways

- Form: Fi Series 3+ is a tracker built into its own collar band; Tractive DOG 6 is a clip-on unit for collars up to 3 cm (1.18 in) wide.
- Weight: Fi lists the Series 3+ at 47 g; Tractive lists the DOG 6 at 39 g and the DOG 6 XL at 70 g.
- Battery: Fi says up to 3 months at low activity and up to 2 weeks at high activity; Tractive says up to 14 days for the DOG 6 and 6 weeks for the XL, with Power Saving Zones.
- Network: Fi Series trackers use AT&T's LTE-M network, with roaming in the US, Canada and Mexico; Tractive's Premium plan works in over 175 countries.
- Both need a subscription, both have escape alerts, and both makers publish an IP68 rating to 1.5 m for 30 minutes.

## Products (chosen from listings, not tested)

1. **Fi Series 3+ GPS Dog Collar and Tracker** (details: https://petprooflab.com/walks-travel/fi-vs-tractive-gps-collars#product-B0HJ3QZL9S) — Buy it for a dog that wears the same collar every day and rarely roams far from home.
   - Pros: Tracker built into the collar band; five band sizes from under 10 lb to 95 lb and up, per Fi; Battery up to 3 months at low activity, 4 to 6 weeks moderate, up to 2 weeks high, per Fi; IP68 and IP66K rated; LED light; Apple Watch app; sold by Fi
   - Cons: Membership required; only the Large and XL sizes were in stock on Amazon when we checked
2. **Tractive DOG 6 Smart Dog GPS Tracker** (details: https://petprooflab.com/walks-travel/fi-vs-tractive-gps-collars#product-B0D6Z4L6BW) — Buy it if you want the lighter unit, the freedom to swap collars, or coverage abroad.
   - Pros: 39 g clip-on unit that fits collars up to 3 cm wide, or a harness, for dogs from 4 kg (8.8 lb), per Tractive; Up to 14 days of battery with Power Saving Zones; IP68; Virtual fences with escape alerts; heart and respiratory rate monitoring, per the listing; sold by Amazon.com
   - Cons: Subscription required, and the Basic plan works in one country only
3. **Tractive DOG 6 XL GPS Tracker** (details: https://petprooflab.com/walks-travel/fi-vs-tractive-gps-collars#product-B0G52NY6HZ) — Tractive's answer to Fi's battery life, for big dogs only.
   - Pros: Up to 6 weeks of battery with Power Saving Zones, per Tractive; Fits collars up to 4 cm (1.6 in) wide; for dogs over 20 kg (44 lb); Sold by Amazon.com
   - Cons: 70 g, heavier than both the DOG 6 and the Fi Series 3+
4. **Tractive CAT 6 Mini GPS Tracker with Breakaway Collar** (details: https://petprooflab.com/walks-travel/fi-vs-tractive-gps-collars#product-B0GKGDZ726) — If a cat shares the house, this puts both pets in one Tractive app.
   - Pros: Tracker and breakaway collar in one, 32 g together, per Tractive; Up to 7 days of battery with Power Saving Zones; sold by Amazon.com
   - Cons: Tractive's help page says it is for cats of 3 kg (6.6 lb) and up

Fi and Tractive both sell cellular GPS trackers for dogs, and the choice mostly comes down to form and battery. The Fi Series 3+ is a collar with the tracker built in and a battery Fi rates in weeks to months; the Tractive DOG 6 is a lighter clip-on unit that needs charging more often but moves to any collar or harness. This page compares them only on what each maker publishes and what the Amazon listings say.

**How we chose:** we did not test either tracker; we read Fi's and Tractive's help centers and listings, and kept models sold by Amazon.com or the brand's own store that were in stock on September 28, 2026.

## Fi Series 3+ vs Tractive DOG 6 at a glance

| | Fi Series 3+ | Tractive DOG 6 |
|---|---|---|
| Form | Tracker built into a collar band | Clip-on unit, collars up to 3 cm wide or a harness |
| Weight (per maker) | 47 g | 39 g (DOG 6 XL: 70 g) |
| Size (per maker) | 81.5 × 30 × 11.5 mm | 71 × 29 × 17 mm |
| Smallest dog | XS band, under 10 lb | 4 kg (8.8 lb) |
| Battery (per maker) | Up to 3 months low activity, 4–6 weeks moderate, up to 2 weeks high | Up to 14 days with Power Saving Zones (XL: 6 weeks) |
| Water rating | IP68 (1.5 m, 30 min) and IP66K | IP68 (1.5 m, 30 min) |
| Network | AT&T LTE-M; roaming in US, Canada, Mexico | Partner 2G/LTE networks in 175+ countries (Premium plan) |
| Plan required | Yes, Fi Membership | Yes, Premium or Basic |
| Escape alerts | Safe Zones, Lost Mode | Virtual fences, LIVE mode |
| Cat option | Fi Mini (dogs and cats) | CAT 6 Mini, CAT Mini |

| Tracker | Sold by | Amazon price |
|---|---|---|
| [Fi Series 3+, Large](https://petprooflab.com/walks-travel/fi-vs-tractive-gps-collars#product-B0HJ3QZL9S) | Fi | see the current Amazon price on the page |
| [Tractive DOG 6](https://petprooflab.com/walks-travel/fi-vs-tractive-gps-collars#product-B0D6Z4L6BW) | Amazon.com | see the current Amazon price on the page |
| [Tractive DOG 6 XL](https://petprooflab.com/walks-travel/fi-vs-tractive-gps-collars#product-B0G52NY6HZ) | Amazon.com | see the current Amazon price on the page |
| [Tractive CAT 6 Mini](https://petprooflab.com/walks-travel/fi-vs-tractive-gps-collars#product-B0GKGDZ726) | Amazon.com | see the current Amazon price on the page |

Fi's figures come from its [product comparison](https://support.fitracking.com/hc/en-us/articles/45215480007059-Choose-the-Best-Fi-Product-For-You), [battery page](https://support.fitracking.com/hc/en-us/articles/9007912360723-Fi-Tracker-Battery-Life), [waterproof rating page](https://support.fitracking.com/hc/en-us/articles/9601779886867-Fi-Tracker-Waterproof-Rating) and [collar sizing chart](https://support.fitracking.com/hc/en-us/articles/360018860034-Find-Your-Fi-Series-Collar-Size). Tractive's come from its [tracker comparison](https://help.tractive.com/hc/en-us/articles/360001285329-Which-tracker-is-right-for-my-pet), [water rating page](https://help.tractive.com/hc/en-us/articles/205507262-Are-Tractive-trackers-waterproof-and-dustproof) and [attachment guide](https://help.tractive.com/hc/en-us/articles/205663971-How-to-attach-your-tracker-to-your-pet-s-collar).

## Collar or clip-on

This is the biggest practical difference. Fi describes the Series 3+ as having a "durable, integrated design" that "includes a collar band." You pick a band by your dog's weight: Fi's chart runs from Extra Small (under 10 lb, 9.5 to 11 in) to Extra Large (95 lb and up, 20 to 31 in). The tracker and band are one system, though other makers sell "Fi-ready" collars on Amazon.

The Tractive DOG 6 slides onto a collar you already own with a rubber mount, for collars up to 3 cm (1.18 in) wide. The XL mount takes collars up to 4 cm. Tractive says you can also attach it to a harness. That makes it easy to move between a daily collar and a hiking harness.

Which suits you? If your dog wears the same collar every day, Fi's integrated band is one less thing to fit. If you swap collars, walk in a harness, or your dog wears a wide martingale, the Tractive clip is more flexible. On Amazon, only the Large and XL Fi Series 3+ sizes were in stock when we checked, so smaller dogs may need to buy from Fi directly.


## Battery and charging

Fi's battery claim depends heavily on how your dog lives. Its battery page estimates up to 3 months for a dog "mostly at home or on short walks," 4 to 6 weeks for "regular time in the yard," and up to 2 weeks for a dog "outdoors for most of the day." In Lost Mode, which tracks every few seconds, Fi says a full battery lasts about 2 days. The Series 3+ charges on a Fi Base.

Tractive lists the DOG 6 at up to 14 days and the DOG 6 XL at up to 6 weeks, both "with Power Saving Zones," a setting that saves battery in places like home. Its coverage page adds that battery life gets shorter in areas with poor cell coverage, because the tracker works harder to connect.

So for a dog that rarely leaves home, Fi's figure is far longer. For a dog that roams all day, Fi's own estimate (up to 2 weeks) is about the same as Tractive's DOG 6, and the Tractive XL's 6 weeks is longer, if your dog is big enough for it.


## Water, dust and wear

Both are rated IP68, and both makers give the same limit. Fi says its Series trackers "can be submerged in water up to 1.5m deep for up to 30 minutes," and the Series 3+ is also tested to IP66K, meaning a pressure-jet spray test. Tractive says its trackers are "waterproof up to 1.5 meter (4.9 feet) depth for 30 minutes" and dust-tight. Both recommend cleaning the tracker after a swim. For a dog that swims, neither has an edge on paper.

## Coverage and travel

Fi's Series trackers send location over AT&T's LTE-M network. Fi's [AT&T page](https://support.fitracking.com/hc/en-us/articles/10703013871635-Fi-Partnership-with-AT-T) says your phone can be on any carrier, and its [Series 3+ page](https://support.fitracking.com/hc/en-us/articles/40961975299859-Upgrade-to-the-Fi-Series-3) says roaming lets it connect to AT&T's LTE-M network across the United States, Canada and Mexico. Check AT&T coverage where your dog actually goes before you buy.

Tractive connects through partner networks, 2G and/or LTE (Cat-M1), in over 175 countries, per its [coverage page](https://help.tractive.com/hc/en-us/articles/360001156409-Do-I-need-cellular-coverage). There is a plan catch: the [travel page](https://help.tractive.com/hc/en-us/articles/360000947585-Can-I-use-Tractive-when-traveling-abroad) says the Premium plan works in all those countries, while Basic works in one country only.

If you take your dog to Europe or further afield, that points to Tractive Premium.

## Subscriptions

Neither works without a plan. Fi's [coverage page](https://support.fitracking.com/hc/en-us/articles/360019369354-Fi-Tracker-Cellular-Coverage) says "a Fi Membership is required to enable a Series 3+, Series 3, Fi Mini, or Fi Ultra tracker." Tractive's [subscription FAQ](https://help.tractive.com/hc/en-us/articles/205721161-Tractive-subscription-plans-Frequently-asked-questions) says trackers with real-time tracking "always require a subscription." Tractive offers Premium (175+ countries, a year of history, family sharing) and Basic (one country, 24 hours of history, only in some countries). Plan prices vary with the billing term and, for Tractive, by country, so compare the total for the years you expect to use it on each maker's site.

## Escape alerts and extras

Both do the core job: you draw a safe area and get an alert when the dog leaves it. Fi calls these Safe Zones; its microchip comparison page says Fi "will alert you once your pet leaves any of your designated Safe Zones," and Lost Mode switches on live tracking. Tractive calls them virtual fences, and its listing says LIVE mode updates location every 2 to 3 seconds.

The extras differ. Fi says the Series 3+ tracks steps and sleep and uses AI to detect barking, licking, scratching, eating and drinking, and it has an LED light and an Apple Watch app. Tractive's listing describes monitoring of heart and respiratory rate and bark monitoring, with health alerts when patterns change. Neither is a medical device; if an alert worries you, ask your vet. This page is not veterinary advice ([more on that](https://petprooflab.com/about#veterinary)).


## If you also have a cat

Tractive makes two cat trackers. The CAT 6 Mini has a breakaway collar built in and weighs 32 g with it; the CAT Mini is 25 g and ships with a Rogz breakaway collar. Fi's cat option is the Fi Mini, a 16 g clip-on that Fi says works with dogs and cats and runs on Verizon's network rather than AT&T's; it was not in stock on Amazon when we checked. For how the rest of the market compares, including why an AirTag is not a GPS tracker, see our full guide to [GPS pet trackers](https://petprooflab.com/walks-travel/gps-pet-trackers).

## Who each one suits

**Buy the Fi Series 3+ if** your dog wears one collar every day, spends most of its time at home or on short walks, and you want to charge it rarely. Fi's own estimates put that at up to 3 months.

**Buy the Tractive DOG 6 if** your dog is small, wears a harness or several collars, you travel outside the US, Canada and Mexico, or you want a cat on the same app. Choose the **DOG 6 XL** for a dog over 44 lb that needs a longer battery.

Neither replaces a tag or a microchip; our guide to [dog and cat collars and ID tags](https://petprooflab.com/walks-travel/dog-collars-and-id-tags) covers both. We found no FDA or CPSC recall for Fi or Tractive in our [pet product recall list](https://petprooflab.com/recalls).

## Frequently Asked Questions

### Is Fi or Tractive lighter?

Tractive, going by the makers' figures: Tractive lists the DOG 6 at 39 g and Fi lists the Series 3+ at 47 g. The Tractive DOG 6 XL is heavier than both, at 70 g.

### Does Fi or Tractive have a longer battery?

It depends on your dog. Fi says up to 3 months for a dog mostly at home but up to 2 weeks for one outdoors all day; Tractive says up to 14 days for the DOG 6 and 6 weeks for the XL, with Power Saving Zones.

### Can I use a Tractive on my own collar?

Yes. The DOG 6 mount fits collars up to 3 cm wide and the XL mount up to 4 cm; Tractive says it can go on a harness too. The Fi Series 3+ comes as a tracker with its own collar band.

### Do Fi and Tractive work outside the US?

Tractive's Premium plan works in over 175 countries; its Basic plan works in one. Fi says its Series 3+ roams on AT&T's LTE-M network in the United States, Canada and Mexico.

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*PetProofLab is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. We did not test these trackers; weights, battery life, water ratings and network details are the makers' own, from their help pages and listings.*

## Sources

- support.fitracking.com: [Product comparison](https://support.fitracking.com/hc/en-us/articles/45215480007059-Choose-the-Best-Fi-Product-For-You)
- support.fitracking.com: [Battery page](https://support.fitracking.com/hc/en-us/articles/9007912360723-Fi-Tracker-Battery-Life)
- support.fitracking.com: [Waterproof rating page](https://support.fitracking.com/hc/en-us/articles/9601779886867-Fi-Tracker-Waterproof-Rating)
- support.fitracking.com: [Collar sizing chart](https://support.fitracking.com/hc/en-us/articles/360018860034-Find-Your-Fi-Series-Collar-Size)
- help.tractive.com: [Which tracker is right for my pet](https://help.tractive.com/hc/en-us/articles/360001285329-Which-tracker-is-right-for-my-pet)
- help.tractive.com: [Are Tractive trackers waterproof and dustproof](https://help.tractive.com/hc/en-us/articles/205507262-Are-Tractive-trackers-waterproof-and-dustproof)
- help.tractive.com: [Attachment guide](https://help.tractive.com/hc/en-us/articles/205663971-How-to-attach-your-tracker-to-your-pet-s-collar)
- support.fitracking.com: [AT&T page](https://support.fitracking.com/hc/en-us/articles/10703013871635-Fi-Partnership-with-AT-T)
- support.fitracking.com: [Series 3+ page](https://support.fitracking.com/hc/en-us/articles/40961975299859-Upgrade-to-the-Fi-Series-3)
- help.tractive.com: [Coverage page](https://help.tractive.com/hc/en-us/articles/360001156409-Do-I-need-cellular-coverage)
- help.tractive.com: [Travel page](https://help.tractive.com/hc/en-us/articles/360000947585-Can-I-use-Tractive-when-traveling-abroad)
- support.fitracking.com: [Coverage page](https://support.fitracking.com/hc/en-us/articles/360019369354-Fi-Tracker-Cellular-Coverage)
- help.tractive.com: [Tractive subscription plans Frequently asked questions](https://help.tractive.com/hc/en-us/articles/205721161-Tractive-subscription-plans-Frequently-asked-questions)

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Last updated: 2026-09-28
Canonical URL: https://petprooflab.com/walks-travel/fi-vs-tractive-gps-collars
How to cite: "Fi vs Tractive (2026): Which GPS Tracker Fits Your Dog", PetProofLab, https://petprooflab.com/walks-travel/fi-vs-tractive-gps-collars (checked 2026-09-28).
Disclosure: as an Amazon Associate PetProofLab earns from qualifying purchases. Safety information summarizes public guidance and is not medical advice.