Fi Series 3+
By Arina Nikoliukina · Reviewed · Updated · Prices and recalls checked 10/09/2026
9OF 10
Excellent
- Battery (claimed)
- 90 days
- Network
- GPS + LTE-M
- Type
- GPS tracker
- App required
- Yes
- Subscription
- Subscription required · $189/yr
- First-year cost
- $318
Real cost, first year
10/09/2026| Device | $129 | $129 |
|---|---|---|
| Shipping | $0 | free to the contiguous US per the vendor page |
| Plan (12 months) | $189 | |
| Consumables (12 months) | $0 | |
| First-year cost | $318 | plus sales tax — varies by state |
| Each year after | $189 | plan and consumables at the vendor's intervals |
Category median first-year cost in our database: $216.
Specs and sources
Checked 10/09/2026 · source under each valueApp & subscription
AppFi - GPS Dog Tracker (Barking Labs Corp.) · App Store 4.65 (41,277 ratings) · Google Play 4.3 (4,720)apps.apple.com · 10/09/2026
App privacy labelApp Privacy labels not read (App Store page 429). 21 of 50 recent App Store reviews complain the app requires phone location permission 'Always' to open.apps.apple.com · 10/09/2026
Plans6-month prepaid membership: $99 USD every 6 months (renews at standard price) · 1-year membership: $189 USD every year — default plan on activation ('When you activate, you are placed on the 1-year membership plan by default. You then have 7 days to switch') · 2-year membership: $339 USD every 2 years · No month-to-month plan listed for Series 3+/Mini/Ultra in the billing article (edited 2026-09-15); 'all membership plans have a minimum 6-month commitment period' · Vendor catalog API (not seen rendered): hardwareFirstMembershipTerms intro first-term prices 6 mo $59 / 12 mo $99 / 24 mo $189 vs list $99/$189/$339; activationFeeInCents 2000 ($20) on prepaid SKUs; 'S3+ 12 Month membership-Free Trial' $189 with 30-day trial and $12 'Shipping for Free Trial'; multiDogDiscountAmount 5support.fitracking.com · 10/09/2026
Without a planVendor: 'To activate and enjoy the features of a Fi Series 3+, Series 3, Fi Mini, or Fi Ultra, an active Membership is required.' / 'The Fi Tracker will only work with an active membership.' / 'Without an active Fi Membership, Lost Mode is not available.'support.fitracking.com · 10/09/2026
Consumables
Safety & recalls
Buying
Warranty1 yr · extended: Extended Hardware Warranty (for as long as membership active) applied only to Series 3/3+ bought on or before 2025-08-24; 2-year warranty for purchases 2025-08-25…2025-09-28support.fitracking.com · 10/09/2026
Returns30 days · only if returned without RMA or missing parts: 'the higher of fifteen (15) per cent of the original price ... or the retail value of the missing or broken parts'support.fitracking.com · 10/09/2026
SupportChat, phone and email per membership page ('Support is available by phone, chat, and email'); help center support.fitracking.comvendor support page
Brand page or manualRegulator database (CPSC)
Where to buy
Prices checked 10/09/2026support.fitracking.com · official$129checked 10/09/2026
Prices as printed on the store page on the date shown, before sales tax; stock and bundles differ by store.
Compared with similar GPS dog collars
All 10 GPS dog collars →| Model | Score | Price | Subscription | 1st-year cost | Battery (claimed) | Network | Warranty | Actions |
|---|---|---|---|---|---|---|---|---|
 Tractive DOG 6 XL | 9.5/10 | $53.40 sale / $89 list | Subscription required · $108/yr | $161 | 42 days | LTE/4G | 2 yrs | See specs → |
 Pawfit 3 GPS Dog Tracker | 9.5/10 | $59.99 | Subscription required · $155.88/yr | $216 | 8 days | 4G cellular | 1.5 yrs | See specs → |
 Fi Mini | 9/10 | $99 | Subscription required · $189/yr | $297 | 60 days | GPS + LTE-M | 1 yr | |
 Invoxia Minitailz Biotracker | 9/10 | $119 | Subscription optional · $129.95/yr | $249 | 15 days | LTE-M | 1 yr | See specs → |
 Fi Series 3+ | 9/10 | $129 | Subscription required · $189/yr | $318 | 90 days | GPS + LTE-M | 1 yr |
What owners say
Checked 10/09/2026Owner reviewsMixed
50owner reviews read on App Store
- App Store50 read · 10/09/2026 · Fi app is shared by Series 3+/3/Mini/Ultra; 50 most recent reviews 2026-08-18…2026-10-074.7/541,277 ratings
- Google Play10/09/20264.3/54,720 ratings
- Amazon10/09/2026 · listing currently unavailable; only rating, 'Customers say' and aspect counts read3.8/5983 reviews
Mixed, or too few independent ratings to call. In our score this is 1.75 of 2 points. How we score
Owner Complaint Index
- App connectivity26% of 50
- Gps accuracy16% of 50
- Subscription price10% of 50
Share of the 50 owner reviews we read that mention each complaint; checked 10/09/2026. How it's counted
Praise that comes up again
- peace of mind / found dog quickly
- escape ('left the property') notifications
- long battery for some owners ('charge every other week or so')
- waterproof
Praise
“only have to charge every other week or so and I think the collar is 2 years old.”
Complaint
“The battery life is never more than 5 to 6 days even within range of multiple basis 20 to 22 hours a day.”
Praise
“I have the collars for all 4 of my dogs and could not be happier about accuracy and freedom it gives us!”
Complaint
“When he runs off, even after lost mode is activated 15-30 min later there is no updated location.”
Complaint
“the company makes it nearly impossible to cancel or change the service.”
Complaint
“App forces you to allow permanent gps access or it will refuse to open.”
Quotes are word for word from the linked pages, and we pick praise and complaints alike. Reviews on the brand's own site and reviews written for a free product are not counted. Store ratings change over time; the date shows when we checked.