Fi Series 3 vs Apple AirTag
Our call: Fi Series 3 (PetScore 84 vs 74) — but the cost lines below can flip it for your household.
★ Our pick
Fi · GPS tracker
Series 3
long-battery LTE collar for dogs
84PetScore
Sub required
Sticker$149
Total (3 yr)$635
Apple · GPS tracker
AirTag
suburban backup finder, not a GPS tracker
74PetScore
No subscription
Sticker$29
Total (3 yr)$65
| Line item | Fi Series 3 | Apple AirTag |
|---|---|---|
| Category | GPS tracker | GPS tracker |
| Street price | $149 | $29 |
| Subscription | Required · $8–$19/mo | None |
| Consumables | None | ~$1/mo (CR2032 battery yearly) |
| Proprietary refills | No | No |
| Works offline | No — cloud-dependent | Yes |
| Run rate after purchase | $14/mo | $1/mo |
| Year-1 total | $311 | $41 |
| 3-year total | $635 | $65 |
| PetScore | 84/100 | 74/100 |
The verdict
Buy the Fi Series 3 if you want the better overall package — it leads the PetScore 84 to 74 and is the stronger fit for long-battery LTE collar for dogs.
Buy the Apple AirTag if its strengths match your household — it's built for suburban backup finder, not a GPS tracker. It's also the cheaper one to own: $65 vs $635 over three years, a gap of $570 that may settle the question by itself. Either way, the receipts are on each device's true-cost page.