What Our Research Found
We set out to answer one question a buyer actually cares about. For $149 plus a recurring fee, does the Fi Series 3+ find a lost dog faster and more reliably than a $50 tracker or a $35 AirTag taped to a collar? Step counts, sleep graphs and leaderboards are all secondary to that.
The $149 you see on the listing is the down payment, not the price. Fi's tracking is dead on arrival without an active data plan, and while this collar includes a 6-month membership, the plan is billed separately in US dollars for as long as you own it after that. Fi's published membership pricing as of early 2026 runs roughly US$99 to $199 per year depending on the term you commit to, and it's subject to change, so check the current rate on Fi's site before you order rather than after.
The hardware side is genuinely strong. Fi built the Series 3+ around LTE-M, a low-power cellular standard designed for small battery-powered devices, and pairs it with Bluetooth and a Wi-Fi base station so the module only wakes the cellular radio when your dog leaves the safe zone. That architecture is why Fi can advertise battery life in months rather than days, a figure that collapses to days if your dog is regularly out of range and pushing live location. The band is a proper collar, the module is IP68-rated per the manufacturer, and reflective stitching plus an LED are practical touches. The soft spots are commercial rather than mechanical: subscription lock-in, a module that only fits Fi's own bands, and Fi's cellular service footprint, which has been built primarily around the United States. A Canadian buyer needs to confirm current coverage in their actual postal code before ordering, because a cellular tracker with no signal is a very expensive activity band.
Bottom line
Buy it if your dog escapes and you want the fastest realistic recovery tool short of a professional pet-recovery service. Skip it if you're buying an activity monitor, if you want to avoid a recurring bill, or if you can't confirm that Fi's network reaches the streets where you actually walk your dog.
The clearest winners are owners of high-drive escape artists in well-covered urban and suburban areas. Casual step counters, rural owners and small-breed owners will get more value from a cheaper LTE tracker with a lower monthly fee, or from tightening up their fencing.
How we assessed it
We didn't run a lab test, and we won't pretend otherwise. Our assessment is built from three things: the manufacturer's published specifications, the technical characteristics of the radio standards the device uses, and the patterns that repeat across publicly posted owner reviews. We're not quoting an aggregate star score, because we can't verify one across storefronts. What we can say is that praise clusters around escape alerts and battery, while complaints cluster around cost stacking, module retention and patchy signal. Where a number comes from Fi rather than an independent test, we've labelled it as a manufacturer claim. The battery figure in particular is a marketing best case rather than a measured guarantee, and the plan pricing is Fi's published rate as of early 2026 rather than a locked-in price.
The Good & The Bad
thumb_up What We Loved
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Genuinely long battery for a cellular tracker
Because the collar sits idle on Bluetooth and Wi-Fi at home and only wakes the LTE radio outside the safe zone, you're charging on a weekly-to-monthly rhythm rather than nightly. That alone puts it ahead of first-generation GPS collars.
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Escape alerts, not just location
The geofence logic pushes a notification the moment the dog leaves, which is the difference between a five-minute head start and a two-hour one. For fence jumpers and door dashers, the alert matters more than the map.
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Built like an actual collar
It's a rugged band with an IP68 module and reflective stitching rather than a plastic pod zip-tied to existing gear. Fewer snag points, less rattle, and the LED is useful on unlit evening walks.
thumb_down Honest Drawbacks
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Coverage outside the US is the biggest unknown
Fi's cellular service has been built primarily around US carrier coverage, and its Canadian availability isn't clearly guaranteed on the listing. Before ordering on Amazon Canada, confirm with Fi that your specific area is supported. Otherwise you've bought a $149 activity band.
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The subscription never ends
There's no lifetime option and no meaningful free tier. Budget roughly US$99 to $199 per year on top of the collar, which is Fi's own published plan pricing as of early 2026 and can change. Lapsing the plan disables the one feature you bought it for.
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Battery claims assume ideal conditions
The multi-month figure depends on your dog sitting inside a Wi-Fi home zone most of the day. Frequent Lost Dog mode, poor signal, or heavy live-tracking can cut it to days, and cold weather makes it worse.
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Closed ecosystem and lost-module risk
The tracker only fits Fi's own bands, so replacements come from one supplier. A meaningful share of public reviews mention modules popping out of the band or bands being chewed through, and negative feedback about hardware failures and service problems shows up often enough that it reads as a pattern rather than a handful of unlucky units.
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The included membership makes year one look cheaper than year two
Listings for this collar bundle a 6-month membership, which is welcome. It also means the first renewal notice arrives six months after you've stopped thinking about cost, and the real annual figure only shows up then.
Technical Breakdown
Connectivity
LTE-M cellular + Bluetooth + Wi-Fi base station
Subscription requirement
Required; 6-month membership included, then roughly US$99-$199/yr per Fi's published pricing as of early 2026, subject to change
Battery life
Up to 3 months claimed (manufacturer figure)
Water and dust resistance
IP68-rated module (manufacturer-listed)
Fit and size (Medium, gray)
Medium band; module fits Fi bands only
How It Works
Setup is app-driven and takes about 20 minutes, most of which is waiting for the first charge and defining your home safe zone.
Charge the module first
Pop the tracker out of the band and put it on the supplied base station until it shows a full charge. Fi ships units partly charged, and a first full top-up gives you an accurate baseline for battery expectations.
Create the account and start a plan
Download the Fi app, create an account, and activate the data subscription that comes with the collar's included 6-month membership. Tracking, alerts and location history stay locked until a plan is live, and this is the step most buyers don't expect at checkout.
Set the home base as your safe zone
Plug the base station into power and Wi-Fi near where your dog sleeps. The collar treats that Wi-Fi signal as home, stays in low-power mode inside it, and only fires up cellular GPS when your dog leaves.
Fit the Medium band
Thread the band, leave two fingers of slack, and trim to size. The module rides on the underside of the neck. Check the fit weekly on growing dogs, because a loose Fi collar is how most owners lose the tracker rather than the dog.
Add safe zones and test an escape
Add extra Wi-Fi zones for work, daycare or a family member's house, then walk the dog out of the home zone once and watch how fast the app flips to Lost Dog mode. Do this before you need it.
How It Compares
| Feature | Fi Series 3+ Smart Dog Tracker Collar (Gray, Medium) | Typical Alternative |
|---|---|---|
| Hardware price | $149 | Tractive GPS DOG: roughly $60-$90 |
| Subscription | Required, 6-month membership included, then roughly US$99-$199/yr (Fi published pricing, early 2026, subject to change) | Required, roughly $6-$13/mo on annual plans |
| Tracking tech | LTE-M + GPS, Bluetooth, Wi-Fi home zones | LTE + GPS, some with Bluetooth proximity |
| Battery life | Up to 3 months claimed (home-zone dependent) | 2-7 days typical between charges |
| Water resistance | IP68 module (manufacturer-listed) | IPX7 to IP67 typical |
| Form factor | Integrated collar band, module fits Fi bands only | Clip-on pod attaches to any existing collar |
| Canadian coverage | Verify with Fi before purchase | Tractive lists explicit Canadian coverage |
| Best for | Escape artists where cellular coverage is strong | Budget buyers, rural owners, multi-dog households |
Frequently Asked Questions
Is the Fi Series 3+ worth $149 for an escape-artist dog?
If your dog is a genuine escape risk and your neighbourhood has solid cellular service, yes. The instant escape alert and the speed of recovery are what you're paying for, and nothing cheaper matches the collar build. It's the wrong buy if you mainly want step and sleep charts, or if a lost dog has never been a realistic worry.
Does the Fi Series 3+ need a subscription to track your dog?
Yes. Live location, escape alerts and location history all require an active Fi data plan, billed separately in US dollars at roughly US$99 to $199 a year depending on term, per Fi's published pricing as of early 2026 and subject to change. Without a plan the collar is an offline step counter, and there's no lifetime or one-time purchase option.
Does the Fi collar work in Canada on Canadian networks?
Verify before you buy. Fi's cellular service has been developed primarily around United States carrier coverage, and the Amazon Canada listing doesn't guarantee network support in your area. Contact Fi with your postal code first, because a tracker that can't complete a cellular check-in won't report location no matter how good the hardware is.
How long does the Fi Series 3+ battery actually last between charges?
Up to three months by the manufacturer's claim, though days to weeks is the realistic range depending on use. That headline number assumes your dog spends most of its time inside a Wi-Fi home zone with the cellular radio asleep. Frequent escapes, live tracking, weak signal and cold weather all shorten it substantially.
Fi Series 3+ vs Tractive for a Canadian dog owner?
Tractive wins on price and confirmed Canadian coverage; Fi wins on battery life and collar build. Tractive hardware runs roughly $60 to $90 with plans around $6 to $13 monthly, but needs charging every few days. Choose Fi for a durable integrated collar and long runtime, Tractive for lower total cost and a clip-on that fits any collar.
Is the Fi collar waterproof and safe for swimming dogs?
The module carries a manufacturer-listed IP68 rating, meaning dust-tight and submersion-capable to Fi's specified depth and time. That covers lakes, rain, mud and baths in normal use. Rinse and dry the band after saltwater, and check the module seats firmly in its slot afterward, since loose modules are a common owner complaint.
library_booksReferences & Further Reading
Our reviews are informed by peer-reviewed research and authoritative health organizations. These sources provided context for this review:
- linkFi (TryFi) official product and plan specifications
- linkFi (TryFi) published membership pricing — source of the US$99-$199/yr figures cited here (rates as of early 2026, subject to change)
- linkFCC Equipment Authorization Search (verify radio device certification)
- linkInnovation, Science and Economic Development Canada — radio equipment certification
Editorial note: Links to external sources are provided for informational purposes. ReviewHubNow is not affiliated with these organizations and does not receive compensation for linking to them.
The Fi Series 3+ is the best-built consumer dog tracker we've researched in this price band, and the escape-alert system...
Based on our research and analysis, Fi Series 3+ Smart Dog Tracker Collar (Gray, Medium) scored 7.1/10. See the full verdict above for who it suits — and who should pass.
View Price on Amazon Canadaarrow_forwardVerify official availabilityWhat Owners Report
Recurring themes we found across public owner reviews.
Owners who deal with genuine escape artists say the leave-the-home-zone alert has recovered their dog fast enough to justify the whole cost, and many mention going weeks between charges when the dog is mostly home.
The recurring theme in negative reviews is cost stacking: buyers feel the subscription wasn't clear at purchase, and several report the annual fee eventually outweighing the value of the hardware they already paid for.
A steady minority describe the module coming loose from the band or the collar being destroyed by chewing, plus scattered reports of location lag or dropouts in areas with weaker cellular signal.
Returns are handled under Amazon Canada's standard 30-day return policy for this listing — confirm the exact window and conditions on the product page at the time of purchase, since terms vary by seller and category. Fi's subscription refund terms are separate from the hardware return, so check Fi's plan terms before activating: an activated plan may not be refundable when you send the collar back.