July 2025. Kress company is advertising new technology in their robotic lawn mowers, RTKn brand, where physical boundary signal wires are no longer needed, with precise positioning with GPS navigation.
"Redefining precision in lawn care with Kress RTKⁿ technology, the KR161 robotic lawn mower introduces satellite-guided, centimeter-level accuracy without the need for any property-specific stationary antennas."
Have not checked other brands but they could also have newer technology.