For years, robot mowers needed a perimeter wire buried or pegged around your lawn. A new generation skips the wire and maps the yard from an app. Here’s how each approach works and where it struggles, so you can match the technology to your yard.
Boundary wire: the original
A low-voltage wire around the lawn’s edge (and around flower beds) creates a signal the mower stays inside. Inside that boundary, many wired mowers move in a random pattern.
- Strengths: doesn’t depend on satellites or light; mature technology.
- Weaknesses: installation takes time; the wire can be cut by aerating or edging; changing the layout means moving the wire.
RTK: satellite positioning with a correction signal
RTK (real-time kinematic) improves normal GPS accuracy from meters to around centimeters by comparing signals with a reference point. Some brands use a base station you install with a view of the sky; others use network RTK (correction data over the cellular network), such as Navimow, which says network RTK is included on its i2 AWD and X4.
- Strengths: neat, systematic stripes; you draw zones and no-go areas in the app.
- Weaknesses: needs open sky. Dense trees, tall walls and narrow side yards between houses can block or reflect satellite signals.
LiDAR: laser scanning
LiDAR spins a laser to measure distances and build a 3D map of surroundings. Mammotion says the YUKA mini 2’s 360° LiDAR has a 2,362 in range; Navimow pitches its i2 LiDAR as working “even under trees or at night”.
- Strengths: no satellite dependence, so it does well around trees and buildings; works in the dark.
- Weaknesses: big, featureless open areas give it fewer landmarks, which is why some brands fuse it with RTK.
Vision (cameras)
Cameras recognize grass edges and obstacles. In current models, vision is mostly paired with RTK or LiDAR for obstacle avoidance: Navimow says its mowers recognize 200+ object types, Anthbot says over 1,000.
Fusion: the 2026 trend
The newest mowers combine methods so one covers another’s weak spot:
| Approach | Example (brand-stated) |
|---|---|
| LiDAR + network RTK + vision | Mammotion LUBA 3 AWD, Navimow H2 |
| LiDAR + RTK/NetRTK + vision | Anthbot M9 Pro |
| RTK + vision | Navimow X4, i2 AWD; Anthbot Genie, M9 |
| LiDAR (+ vision) | Mammotion YUKA mini 2 (LiDAR), LUBA mini 2 (LiDAR + cameras), Navimow i2 LiDAR |
Sources: official product pages for Mammotion, Navimow and Anthbot, checked October 24, 2026.
Which should you pick?
- Open lawn, clear sky: RTK models are usually the best value.
- Big trees, close neighbors, narrow side yards: favor LiDAR or a LiDAR + RTK fusion model.
- Both: fusion models hedge your bets.
- Want no app or connectivity at all: a boundary-wire mower still works, but you’ll install and maintain the wire.
Plug in your yard in the sizing calculator, then see the 2026 shortlist.