Invisible Fence GPS Flex Fence review

Great if…

• you want the longest time between charges on a fence collar
• you like the idea of a local dealer for training
• your yard is half an acre or more

Skip it if…

• your yard is under 1/2 acre or under heavy trees
• you want a stated minimum dog weight: the brand gives a neck range (8 to 28 in) only
• you want dual-frequency GPS, which Invisible Fence does not state

What living with it looks like

The GPS Flex draws unlimited fences in the app and tracks your dog in real time over LTE. Invisible Fence describes the correction as "ultra customizable": tone, vibration and static levels set in the app. A night light on the collar helps you find your dog after dark.

With up to 80 hours per charge, it is the one fence collar here that can go three days between charges. Local Invisible Fence dealers sell in-person training sessions if you want help with the first weeks.

The catch

After the included first year, the tracking plan renews at $99 a year: about $797 over three years with the collar.

Invisible Fence does not say whether the fence keeps working without a cell connection, so we did not score it either way. Warranty is 1 year, with returns within 45 days.

Buying advice

Checked at $599 on the Invisible Fence online store on November 9, 2026, first year of tracking included.