Head-to-head · US prices checked November 9, 2026
Of 7 decided criteria, the Halo Collar 5 wins 4 and the Fi Series 3+ wins 3, on official specs and plan prices.
4 criteria won · $524, $844 over 3 years
3 criteria won · $129, $657 over 3 years
Short answer: pick the Halo Collar 5 for an open yard and the Fi Series 3+ for a fenced one. Halo ($524, about $844 over three years) is a fence that cues your dog back before the line; Fi ($129, about $657 over three years) is a tracker that tells you after your dog has left.
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The better stated figure on each line is highlighted (7 lines can be compared); if either maker does not state a value, the line is left undecided. The 3-year cost adds 36 months of plan at the cheapest billing cycle, at US prices checked on November 9, 2026.
| Criterion | Halo Collar 5 | Fi Series 3+ |
|---|---|---|
| Calculated scoreBetter: the highest | 9.2/10 | 8.3/10 |
| Device priceBetter: the lowest | $524 | $129 |
| 3-year costBetter: the lowest | $844 | $657 |
| Subscription | Required, from $8.74/mo | Required, from $14.13/mo |
| Type | GPS dog fence | GPS dog tracker |
| ContainmentBetter: the most flexible | Custom shapes, several fences | Escape alerts only |
| Fences | Unlimited on the collar (5 on Bronze, 20 on Silver, unlimited on Gold) | Safe zones with escape alerts (no cue to the dog) |
| GPS hardwareBetter: dual-frequency | Dual-frequency | Single-frequency |
| Live tracking | Live, cellular | Live, cellular |
| Battery lifeBetter: the longest | 48 h | 90 days |
| Boundary cues | Tone + vibration, static optional | No cues (alerts to your phone) |
| Smallest dog | 10 lb | Not stated |
| Neck size | 8 to 30.5 in | XS band for dogs under 10 lb (9.5-11 in) up to XL (20-31 in) |
| Smallest yard | 900 sq ft | Not stated |
| Water resistance | IP67 | IP68 and IP66K, salt water tested |
| Warranty | 1 year | 1 year |
| Return windowBetter: the longest | 90 days | 30 days |
If your yard has a real fence and the worry is the gate left open, Fi is the cheaper, lower-maintenance answer: up to 3 months per charge against up to 48 hours. If there is nothing between your dog and the road, an alert after the fact is not enough.
Both need a plan. Halo's Bronze membership starts at $9.99 a month; Fi's membership starts at $99 for 6 months.
The right choice depends on your dog, your yard and the monthly bill you accept. Here is who should buy which.
Over three years the Fi Series 3+ costs $657 against $844 for the Halo Collar 5, device and plan included, at prices checked on November 9, 2026.
Read the review ↗Halo Collar 5 scores 9.2/10 against 8.3/10 overall: the better all-rounder.
Read the review ↗Halo Collar 5: custom shapes, several fences. Fi Series 3+: escape alerts only.
Read the review ↗Fi states 90 days per charge for the Fi Series 3+, against 48 h for the Halo Collar 5.
Read the review ↗The Halo Collar 5 for most owners: it scores higher overall (9.2 vs 8.3/10). Your yard and your dog can still flip it: see the picks by profile on this page.
The Halo Collar 5 needs a Pack Membership Bronze (from $8.74/mo). The Fi Series 3+ needs a Fi Membership (from $14.13/mo). Plan prices as of November 9, 2026.
The Fi Series 3+: $657 against $844 over 36 months, device and plan included, at the cheapest published billing cycle. Try your own numbers in the [3-year cost calculator](/tools/gps-dog-fence-cost-calculator/).
The Halo Collar 5 is rated for dogs from 10 lb. Fi gives a neck range (XS band for dogs under 10 lb (9.5-11 in) up to XL (20-31 in)) rather than a minimum weight for the Fi Series 3+.