Greenworks AiMowbot C30Z

The C20 is the half-acre, front-wheel-drive base of the AiMowbot line Greenworks launched at Walmart in March 2026, and at $998 it is the cheapest way into RTKVision 2.0. The hardware is the same as the C30Z: an RTK reference antenna in the box for roughly 1 in positioning, cameras and night-vision sensors for the 200-plus obstacle types Greenworks claims, an electric 0.75 to 3.5 in height adjuster, 45% (24 degree) slopes on a three-wheel body, 54 dB, IPX6 washdown, LED headlights and built-in 4G plus Wi-Fi and Bluetooth. What you give up against the $1,599 C30Z is a quarter acre of rated coverage and the onboard LCD, and the C20Z at $1,199 is the same mower with that screen. It weighs 26 lb, which makes it easy to carry between front and back yards. Greenworks' own store shows it sold out at $999.99, so Walmart is the live channel. Walmart buyers rate it 3.1 out of 5 across 45 ratings, which is a warning for a mower that is only months old; Greenworks has not published runtime, charge time or the price of the 4G subscription that the anti-theft features depend on, and edge cutting stops about 4 in from borders. A Segway Navimow i2 at a similar price has a longer track record and a published service plan; the Greenworks answer is the 3-year warranty and big-box returns.

Best for A half-acre yard with open sky and moderate slopes whose owner wants wire-free RTK under $1,000 from a big-box brand.

The Optimow 33H is Greenworks' one-third-acre boundary-wire mower, now sold through the Greenworks Commercial dealer network rather than big-box stores; the online store lists it at $1,099.99 and sold out, so a local dealer is the realistic route. The H means high cut, 2.4 to 4.0 in, which suits fescue and Kentucky bluegrass lawns that the 0.8 to 2.4 in Optimow 33 would scalp. Mechanically it is a conventional Husqvarna-style platform: boundary wire plus guide wires, a random bounce pattern, three pivoting razor blades on an 8.7 in disc, a 24V battery, 130-minute recharge, IPX5 washdown and a 19 degree (about 34%) slope rating. Its differentiator is built-in 4G with GPS: the GreenGuide app works from anywhere and the mower can be tracked if it walks off. Owners of the sibling Optimow 50H on Best Buy like the cut but call the app frustrating, and the cellular plan is only prepaid for two years before an annual fee kicks in. There is no edge-cut mode and no camera, so it bumps its way around obstacles. Against a Husqvarna Automower 310 Mark II it is cheaper with a longer warranty, but dealer-only availability and the app complaints keep it from being an easy pick. Best for a flat to gently sloped third-acre lawn within reach of a Greenworks dealer.

Best for Cool-season lawns around a third of an acre whose owner has a nearby Greenworks dealer and wants cellular tracking without wire-free pricing.

The Yuka is Mammotion's two-wheel-drive mower with a party trick nobody else has: an optional $700 sweeper cart that collects clippings and leaves, then dumps them at spots you pick in the app. The 12.6 inch dual-disc deck is nearly as wide as a Luba's, the 1.2 to 4.0 inch height range suits any US grass, and the 2025 lineup runs 1000, 2000 and 3000 square meters (a quarter to three-quarter acre). Positioning is an included RTK station plus a front AI camera; owners with open lawns love it, while a vocal minority in tree-heavy neighborhoods say it simply cannot hold position without clear sky, so this is not the pick for a wooded lot. Rear-wheel drive also means it bogs on rough or soggy ground, and the sweeper, while clever, gets stuck now and then. Mammotion's US store no longer lists the Yuka (the LiDAR-based Yuka mini 2 is its future), but Home Depot and Best Buy still stock it, with the 3000 around $1,449 on sale. If you want an AWD alternative at similar money look at the Luba 2 AWD X clearance; if you want a station-free RWD mower for a small yard, the Yuka mini 2. Best for flat, open lawns up to 3/4 acre with heavy leaf drop.

Best for Flat, open-sky lawns up to three-quarters of an acre where leaf and clipping pickup matters more than hill climbing.

Novabot's N1000 is a wire-free RTK mower from a small US startup, $1,999 on sale at novabot.com (list $2,899) and also sold through Amazon and Walmart; the brand store shows it sold out on and off, so check stock. Positioning fuses an RTK-GPS base with visual-inertial odometry, so the mapped virtual boundary holds briefly under tree cover, and an HD camera plus ToF sensors stop it at walls and steer it around people, pets and rocks. It is rated for 0.75 acre (32,670 sq ft) and 45% slopes, runs up to 150 minutes per charge, cuts an 8.6 in swath, and the app sets per-zone height, speed and schedule with no-go zones. The 0.8 to 3.5 in height range on the current spec beats the 2.7 in ceiling one reviewer measured on an early unit, so confirm the deck version. That same review called it the easiest robot mower it had set up and found obstacle avoidance worked as advertised. The drawbacks are a young brand's thin track record, no cellular (Wi-Fi only, so anti-theft is a PIN lock and lift alert rather than GPS tracking), no rain sensor, and a sub-67 dB noise figure that is louder than the 60 dB class. Novabot advertises a 5-year warranty. Against the Segway Navimow X315 ($1,999, 1/2 acre, three years of 4G included) the N1000 covers more ground for the same money but gives up cellular and a dealer network; the Greenworks Aimowbot C30Z ($1,599) matches its 0.75 acre rating for $400 less.

Best for A mostly open half to three-quarter acre lawn for a buyer who wants row mowing without a wire and will accept a small brand to save on coverage.

Roborock's first lawn mower landed in the US in March 2026 as the RockMow X1 (it is the Z1 everywhere else), and it is built like the robot vacuums that made the brand: overbuilt, quiet and very good at driving. Four hub motors, active front steering and dynamic suspension let it climb 80 percent grades and roll over 3 inch bumps without tearing turf, and owners say the first thing they notice is how silent it is. Positioning is full-band RTK from an included antenna plus four cameras, with a headlight so it can finish after dark. The X115H covers 0.37 acres and the X130H is rated to an acre per charge; both share a 9.5 inch deck and a 1.6 to 3.5 inch app-set height. Early owners like the mapping and app but call the software a work in progress: obstacle avoidance detours widely, zone passages need more room than the stated 2.6 feet, and the PreciEdge module that gets within 1.2 inches of borders is a $150 add-on. Amazon is the main US retailer, and the X115H has already dipped to $1,500 from $2,299. Against the Mammotion Luba 3 you trade a wider deck and LiDAR for a heavier chassis with better steering; against the Navimow X3 you gain AWD. Best for hilly, rutted yards up to an acre where traction matters more than edge precision.

Best for Rough, hilly lawns up to an acre where a heavy, quiet AWD chassis and Roborock's app matter more than a wide deck.

The X5 is the middle of Sunseeker's AWD range and an online-only model: a 0.5 acre rating, four driven wheels on off-road tires with a 60% slope rating, an 8.6 in floating deck adjustable from 1.6 to 3.2 in, and AONavi Pro navigation that fuses an included RTK base station (it needs a spot with open sky) with twin V-SLAM cameras so it keeps its line when trees block satellites. Sunseeker sells it for $1,499 against a $1,999.99 list, with 100 zones, corridors, no-go areas, a rain sensor and an offset blade that trims to within 1.2 in of fences. Sunseeker does not publish runtime, charge time or weight for the US model; an EU-spec review cites a 5Ah pack and 60 dB. That reviewer, on an uneven garden with obstacles placed on purpose, found the suspension and AWD handled the bumps, the binocular cameras avoided everything set out, and the app was simple, but needed three app updates before Bluetooth setup behaved. Store owners on sloped half-acres describe straight stripes and the edge blade taking over fence lines and driveways, and name the step-by-step setup and RTK firmware updates as the main friction. For the same $1,500 the Roborock RockMow X1 claims a full acre and 80% slopes with a wider 9.5 in deck, so the X5's case rests on its edge blade and Sunseeker's US support rather than raw numbers.

Best for Sloped half-acre suburban yards with fences and a driveway to edge, for buyers who want AWD traction at a mid-range price.