Fi
Fi Series 3+
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Best Dog GPS Trackers · head-to-head
Fi Series 3+ vs Invoxia Minitailz Smart Dog Tracker
A sourced, side-by-side comparison. Invoxia Minitailz Smart Dog Tracker is cheaper at $99. Every spec and price links to its source.
Invoxia
Invoxia Minitailz Smart Dog Tracker
$99
Released 2024
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec |  Fi Series 3+ |  Invoxia Minitailz Smart Dog Tracker |
|---|---|---|
| US price | — | $99 |
| Brand | Fi | Invoxia |
| Released | — | 2024 |
| Connectivity type | lte-cellular | lte-cellular |
| Positioning system | gps | gps |
| Subscription required | Yes | Yes |
| Monthly fee (USD) | — | 8.3 |
| Battery life days | — | — |
| Live update interval (s) | — | 30 |
| Weight grams | — | — |
| Waterproof rating | IP68 | — |
| Range miles | — | — |
| Activity tracking | Yes | Yes |
| Health monitoring | Yes | Yes |
| Containment fence | No | No |
Sources — Fi Series 3+: fitracking.com (verified 2026-07-13). Invoxia Minitailz Smart Dog Tracker: invoxia.com (verified 2026-07-13).