Robot lawn mowers sorted by yard size, slope, and budget: best-of lists, head-to-head comparisons, model reviews, RTK and error-code fixes, and winter storage. Picks come from our 90-model spec database, not press releases.
Navimow is cheaper per rated acre at every size from a quarter acre up and has the better support reputation. Mammotion puts AWD and LiDAR on everything and wins on hills and shade. Tables by yard tier, then a plain pick Navimow if / pick Mammotion if list.
At $669 to $799 the i105N is the cheapest wire-free mower from a major brand, and Consumer Reports’ lab rated its cutting strong across the board. It works in a small, open, sunny yard and gets lost under trees. Here is how to tell which yard you have.
Bob Vila’s best overall mower of 2026 is worth $2,499 if you have half an acre or more and can live with a strip at the edges. Here is the X430 vs X450 call, the published tests, and what owners on r/SegwayNavimow report.
The LUBA 3 AWD 3000 is the Mammotion to buy, on sale. Here is what changed from LUBA 2, what eight testers and the owner forums found about setup, shade, and turf scars, and which size fits your yard.
Under $1,000 buys a wire-free robot mower for a flat quarter acre, and a half acre if the Greenworks C20 is in stock. Five picks with Consumer Reports and owner evidence, what you give up at this price, and four models just over $1,000 worth the stretch.
Two-wheel-drive robot mowers quit between 30 and 50 percent grade. This page converts percent to degrees, explains wet-grass traction and the omni-wheel and terrain-kit accessories, and compares five all-wheel-drive and tracked picks.
Wire-free robot mowers come in three kinds: RTK, vision and LiDAR. Here is which one your yard needs, then six picks across small, medium, large and shady yards, with prices as of October 2026.
A mower rated for 1.0 acre is sized for about 0.8 acre of grass. We measure the turf, add 20 to 30 percent headroom, and pick six models across price tiers plus an AWD pick, with October 2026 prices and FCC status.
RTK signal lost almost always means the antenna cannot see enough sky or the link is down. Here is what Float vs Fix means, the placement rules from Navimow and Mammotion, and the fixes in order.
Every Navimow, Mammotion, Husqvarna and Worx error code we could find in an official manual or support page, with its meaning and the first thing to try.