Gladsmile GPS Dog Fence ZF550
#2 in GPSFull review
For a low-cost GPS fence with a custom-shape option and no plan.
Amazon $84.99$84.99
The Gladsmile GPS Dog Fence ZF550 is the better wireless dog fence overall, rated 4.1 to 3.8. The Gladsmile GPS Dog Fence ZF550 leads on features and fit. The PATPET GPS Dog Fence GF500 costs $5 less ($79.99 vs $84.99).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
PATPET GPS Dog Fence GF500
#5 in GPSFull review
For a low-cost circular GPS boundary on open land for bigger dogs.
Amazon $79.99$79.99
Which should you buy?
- Choose the Gladsmile GPS Dog Fence ZF550 for features (custom-shaped boundary vs none of the listed features) and fit (dogs from 15 lb vs dogs from 20 lb).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every GPS wireless dog fence; a clear win is highlighted. How we rank explains each one.
| Factor weight | Gladsmile GPS Dog Fence ZF550 | PATPET GPS Dog Fence GF500 |
|---|---|---|
| Overall rating | 4.1/5 | 3.8/5 |
| 3-year cost 30% | 100 $84.99 over 3 years, no plan needed | 100 $79.99 over 3 years, no plan needed |
| Coverage 10% | 100 6,561 ft stated radius (about 3,104.6 acres) | 100 29,997 ft stated radius (about 64,896 acres) |
| Battery 15% | 52 40 h per charge | 50 battery life not published (neutral score used) |
| Correction 15% | 100 tone, vibration, static | 100 tone, vibration, static |
| Fit 10% | 60 dogs from 15 lb | 40 dogs from 20 lb |
| Features 15% | 30 custom-shaped boundary | 0 none of the listed features |
| Warranty 5% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| Gladsmile GPS Dog Fence ZF550 | PATPET GPS Dog Fence GF500 | |
|---|---|---|
| Boundary | ||
| Type | GPS | GPS |
| Stated coverage | 6,561 ft radius | 29,997 ft radius |
| Largest radius | 6,561 ft | 29,997 ft |
| Custom-shaped boundary | Yes | No |
| Collar | ||
| Battery life | 40 h | - |
| Waterproofing | IPX7 | IP67 |
| Dog weight | 15-120 lb | 20-140 lb |
| Neck size | - | 12-25 in |
| Corrections | Tone, Vibration, Static | Tone, Vibration, Static |
| Static levels | 9 | - |
| System | ||
| Collars included | 1 | 1 |
| Phone app | - | No |
| Live location | No | No |
| Training remote | No | No |
| Cost | ||
| Plan | None | None |
| 3-year cost | $84.99 | $79.99 |