Greenworks Optimow 33H

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.

Greenworks retired the wired Optimow line for consumers in 2026 and replaced it with AiMowbot, and the C30Z is the 3/4-acre model in the front-wheel-drive C series. It uses what Greenworks calls RTKVision 2.0: an RTK reference antenna kit in the box for roughly 1 in positioning, with cameras and night-vision sensors that help it hold its line under trees and spot 200-plus obstacle types. Mowing zones, paths and no-go areas are drawn in the app; there is no wire to bury. The spec sheet is strong for $1,599.99: 45% (24 degree) slopes, an electric height adjuster from 0.75 to 3.5 in, a 54 dB noise rating, IPX6 washdown, LED headlights and a 50-minute charge. It is a front-wheel-drive three-wheeler, so it is not a Luba-style AWD climber, and the 8 in cut is narrower than a Mammotion Yuka's. Two things to weigh before buying: 4G and anti-theft tracking need a subscription Greenworks has not priced publicly, and edge cutting is rated at 4 in from the border, so keep the string trimmer. The 1/2-acre C20 ($999.99) and 1-acre C40 ($1,499.99) are the siblings and the G series adds AWD. It is a 2026 launch with no owner track record yet, which is worth remembering given how much grief the old Optimow app caused. Best for 1/2- to 3/4-acre yards with moderate slopes and a buyer who wants a 3-year warranty behind a wire-free mower.

Best for Half- to three-quarter-acre yards with some slope whose owner wants a current-generation wire-free mower from a big-box brand.

Smonet is a smart-lock and pool-robot brand, and the RLM1000 is its one lawn mower: a quarter-acre boundary-wire unit that Home Depot lists at $999.99. The pitch is that it mows in S-shaped rows instead of the random bounce of a Robomow or Gardena, so a small lawn gets finished in fewer passes, and that its C-ToF wire-break detection puts the break point on the app map instead of leaving you to walk the perimeter with a meter. Beyond that the spec sheet is thin. The 2.5Ah pack runs about 70 minutes and recharges in under two hours, the cut is 8.2 in wide, and the height range is 1.2 to 2.8 in, which is short for fescue and really suits Bermuda or zoysia. It is quiet at 57 dB, has a rain sensor, connects over Wi-Fi and Bluetooth, and Smonet claims 45% slopes. There is no edge mode, no multi-zone support in the literature, no published weight, and nothing on anti-theft beyond the onboard keypad. Retail is the worry: Smonet's own store shows an empty mower collection, Newegg lists it out of stock, and Home Depot's page is the only live US price, so this looks like a run-out rather than a supported line. At $999 it sits against the Robomow RK1000 ($1,199, taller cut, edge disc) and the Gardena SILENO flex ($599, 1 to 4 in cut) and loses to both on maturity.

Best for A quarter-acre warm-season lawn whose owner wants systematic rows from a wired mower and accepts an unproven brand.

The RK1000 is the quarter-acre entry to Robomow's RK line, the same body and 4.9Ah pack as the RK2000 but rated for 1,000 square meters instead of 2,000, and Home Depot sells it for $1,199 with a 3-year warranty. Robomow's own spec sheet is honest about what that battery buys: 40 to 50 minutes of mowing per 60 to 120 minute charge, which is why it carries the smaller rating. What it shares with the RK2000 is the good stuff - a pendulum-suspended floating deck, an offset four-blade disc that trims over the wire on one side, a 45% (24 degree) slope rating inside the mowing area, a 0.6 to 3.9 in height range and a 4.3 in color touchscreen on the mower. Owners at Home Depot report it is quiet and simple to set up, but the same reviews rate it 2.9 out of 5 for the reasons that dog the whole line: the Bluetooth-only app drops connection, it is slow, a lawn near the 10,000 sq ft ceiling does not get finished on one charge, the wire is easy to tear up, and since Robomow's sale to MTD, US parts and support responses are slow and expensive. Robomow's own US site now redirects to a parts store. Against a Gardena SILENO flex at $599 for a similar lawn size, you pay double for the edge-trimming disc, the touchscreen and the taller cut.

Best for Small wired lawns under a quarter acre where the RK's edge-trimming disc and tall cut are worth paying double a Gardena for.

The NX100i is Yard Force's entry-level wired robot for US big-box shelves: $799 at yardforceusa.com, stocked at Home Depot and Lowe's, rated for 1/3 acre (14,520 sq ft) on a 28V pack that runs 80 to 90 minutes per charge. It cuts a narrow 7 in swath with a three-blade mulching disc across five height settings from 1.3 to 2.9 in, so it suits lawns kept short rather than a 3.5 in fescue cut. Yard Force claims 40% slopes, and the differentiator over most sub-$1,000 wired mowers is the iRadar ultrasonic sensor pair on the nose that slows and steers around furniture, pets and toys before the bumper touches them; a rain sensor, lift and tilt cutouts and a PIN lock are standard. Wi-Fi and Bluetooth feed the CloudHawk app for schedules, remote start and height changes, but there is no GPS, cellular or mapping - it mows in a random pattern inside the wire like any classic robot. One hands-on review called it small for its rating and found a full 1/3-acre lawn took two days of scheduled runs to finish, which is the trade-off for the 7 in deck; retail customer reviews mostly praise how easy it is to start and how compactly it stores. Against the Worx Landroid M WR147 ($902, 1/4 acre, 3-year warranty) the NX100i is cheaper, covers more and adds ultrasonic sensing, but gives up a year of coverage and Worx's cut-to-edge blade.

Best for A small, uncomplicated lawn up to 1/3 acre kept on the short side, for a buyer who wants the cheapest robot with real obstacle sensing.

The Landroid L is the half-acre version of the Worx wired platform: same chassis logic as the M, a wider 8 in blade disc and a bigger 5.0Ah (some kits ship 6.0Ah) 20V Power Share pack that swaps into any Worx tool. Worx lists it at $1,499.99 but it has been sitting near $1,000 on Amazon and under $750 at Walmart, which makes it the cheapest half-acre robot from a brand with a US support line. Expect four to six hours laying the 820 ft of included wire. In use it is a bump-and-turn random mower with Cut to Edge, a floating blade disc that copes with lumpy ground, a rain delay, and a 30% slope rating that reviewers flag as the lowest in its class, so skip it on rolling terrain. Reviewers report roughly an hour of mowing per charge, so a full half acre means several dock trips a day and a schedule that runs most days. Obstacle avoidance is a bumper unless you add the ACS ultrasonic kit. Compared with a Husqvarna Automower 415X you give up polish and dealer support for roughly half the price; compared with a Segway Navimow at similar coverage you keep the wire but keep $700 in your pocket. Best for budget-minded owners of flat, open half-acre lawns who would rather spend a Saturday pegging wire than pay for RTK.

Best for Value shoppers with a flat, open lawn up to half an acre who do not mind installing boundary wire.