Quick answer: Pick the Tractive Smart Dog GPS Tracker if you want a small tag that clips onto the collar your dog already wears, with a listed battery life of up to 14 days and heart and respiratory rate monitoring. Pick the Fi Series 3+ if you would rather have an all-in-one smart collar with a stainless steel frame, wireless charging, and Apple Watch support.
Tractive and Fi are two of the best-known names in dog GPS tracking, and on paper they do the same job: both use GPS plus a cellular connection to show your dog’s live location in a phone app, and both need a paid plan to keep working. The differences are in the design, the battery, and the kind of health data each one collects. I have not tested these trackers myself; my picks are based on manufacturer specifications and verified owner reviews.
My Top Picks
- Best for most dogs: Tractive Smart Dog GPS Tracker
- Best all-in-one smart collar: Fi Series 3+ GPS Dog Collar
Top Picks at a Glance
Prime Tractive Smart Dog GPS Tracker
Fi Series 3+ GPS Dog Collar & Tracker
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Tractive vs Fi: Both Trackers Reviewed
1. Tractive Smart Dog GPS Tracker: Best for Most Dogs
Prime Tractive Smart Dog GPS Tracker
As an Amazon Associate I earn from qualifying purchases. Product details and availability are accurate as of the date/time indicated.
The Tractive is a tag, not a collar. It comes with rubber attachment clips and fastens to the collar your dog already has, and Tractive lists it for any dog over 8 pounds. In live mode the listing promises location updates every 2 to 3 seconds with no distance limit, and it describes the tracking as working anywhere in the world.
It also goes further on health than most trackers. Tractive says it monitors changes in your dog’s heart and respiratory rates and learns normal sleep, activity, and barking patterns, then sends an alert when something looks unusual. The listing states it is fully waterproof and runs for up to 14 days on a charge. It has far more owner ratings on Amazon than the Fi, although the average score is the same.
Key specs
- Design: tag that attaches to an existing collar
- Recommended dog size: over 8 lbs
- Live tracking: updates every 2 to 3 seconds
- Battery life: up to 14 days
- Connectivity: cellular and GPS
- Health features: heart and respiratory rate, sleep, activity, bark monitoring
- Warranty: 2 years
Pros
- Works with the collar or harness setup you already use
- Battery life is clearly stated in the listing
- Longer warranty than the Fi
Cons
- Needs a subscription to work
- One more thing hanging on the collar
Bottom line: The more flexible choice, and the safer one if you want the battery life and dog size spelled out before you buy.
2. Fi Series 3+ GPS Dog Collar: Best All-in-One Smart Collar
Fi Series 3+ GPS Dog Collar & Tracker
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The Fi Series 3+ is a complete collar with the tracker built in, so there is nothing extra to clip on. Fi describes a stainless steel frame, an IP68 waterproof rating, a built-in LED light for night walks, and wireless charging. Tracking runs on nationwide cellular and GPS coverage, and Fi says GPS performance is 2x better than earlier generations.
You can draw safe zones around your home or a sitter’s house and get an escape alert when your dog leaves one. Lost Dog Mode then switches to rapid live location updates. The app counts steps, tracks sleep and rest, and detects behaviors such as barking, licking, scratching, eating, and drinking. It also works with Apple Watch, and the whole household can share the app. The first month of membership is included, and it renews after that.
Key specs
- Design: complete smart collar (this listing is size L in gray)
- Build: stainless steel frame, IP68 waterproof
- Charging: wireless
- Connectivity: cellular and GPS, nationwide coverage
- Health features: steps, activity, sleep, behavior detection
- Membership: first month included
- Warranty: 1 year
Pros
- Clean one-piece design with a tough frame
- Apple Watch support and shared household alerts
- Very detailed behavior tracking
Cons
- The listing does not state a battery life figure
- You have to choose a collar size, and membership renews after the first month
Bottom line: The better pick if you want one tidy collar and you live in the Apple Watch world.
Comparison Table
| Feature | Tractive Smart Dog GPS Tracker | Fi Series 3+ |
|---|---|---|
| Design | Tag for an existing collar | Complete smart collar |
| Recommended dog size | Over 8 lbs | — |
| Coverage as listed | Anywhere in the world | Nationwide |
| Live update rate | Every 2 to 3 seconds | — |
| Battery life | Up to 14 days | — |
| Waterproofing | Fully waterproof | IP68 |
| Virtual fence alerts | Yes | Yes |
| Health monitoring | Heart and respiratory rate, sleep, activity, barking | Steps, activity, sleep, behavior detection |
| Apple Watch | — | Yes |
| Subscription | Required | Required, first month included |
| Warranty | 2 years | 1 year |
How to Choose Between Tractive and Fi
Tag or collar
This is the biggest difference. Tractive adds a tag to the collar your dog already wears, which is handy if you like your current collar or switch between several. Fi replaces the collar completely, which looks neater but means picking the right size. For small breeds, weight matters most, so see my guide to the best GPS trackers for small dogs.
Battery life and charging
Tractive lists up to 14 days per charge. Fi does not give a figure in this listing, so I cannot compare the two fairly; what Fi does offer is wireless charging. With any cellular tracker, expect live tracking to drain the battery faster than normal use.
Health and behavior tracking
Tractive focuses on vital signs: heart rate, respiratory rate, sleep, and barking. Fi focuses on behavior: steps, licking, scratching, eating, and drinking. Both are useful for spotting a change in routine, but neither replaces a visit to your vet.
Subscription
Neither tracker works without a plan, because the plan pays for the cellular data. Fi includes the first month of membership, and Tractive says its subscription comes with a 30-day money-back guarantee. Check the current plan options from each brand before you buy. If you never want a monthly fee, read my guide to the best GPS dog trackers without a subscription.
Where you travel
Tractive’s listing says it tracks with no distance limits anywhere in the world. Fi’s listing talks about nationwide coverage. If you travel abroad with your dog, that difference is worth checking with the brand first.
Final Thoughts
For most owners, the Tractive Smart Dog GPS Tracker is the easier recommendation: it fits the collar you already own, lists a clear battery life, and has a longer warranty. The Fi Series 3+ is the one to choose if you want a single rugged collar with wireless charging and Apple Watch support. If you want to see more options, including larger and smaller models, visit my best GPS dog collars guide or browse all GPS dog collar articles.
FAQs
Is Tractive or Fi better?
Neither is better for every dog. Tractive suits owners who want a tag for an existing collar and a clearly listed battery life. Fi suits owners who want an all-in-one collar with a stainless steel frame and Apple Watch support.
Do Tractive and Fi both need a subscription?
Yes. Both use a cellular connection to send your dog’s location to your phone, and the plan covers that data. Fi includes the first month of membership with the collar.
Which one has the longer battery life?
Tractive lists up to 14 days for its standard dog tracker. The Fi Series 3+ listing I checked does not state a battery life figure, so I cannot name a winner from the specifications alone.
Can Tractive or Fi be used on a small dog?
Tractive lists its standard tracker for dogs over 8 pounds. The Fi Series 3+ listing in this comparison is a size L collar and does not give a weight range, so check the available sizes before ordering for a small dog.
Are Tractive and Fi waterproof?
Yes, according to both brands. Tractive describes its tracker as fully waterproof, and Fi lists an IP68 waterproof rating for the Series 3+.
