For budget buyers with open, gently sloped lawns up to a quarter acre who want wire-free RTK mowing at a low price.
Amazon $789.52 Ecovacs $999.99
For steep or uneven lawns up to a quarter acre where you want mapped, wire-free mowing without mounting an RTK antenna.
- 0.25 acresLawn size
- RTK + visionNavigation
- 84% (40°)Max slope
- $8,000Price / acre
- 8.7 inCutting width
- 3 yearsWarranty
Price checked October 21, 2026. As an Amazon Associate we earn from qualifying purchases.
- Four-wheel drive climbs 84% slopes
- Network RTK means no antenna to mount, plus camera mapping that sets up the lawn on its own
- Mows in straight lines and moves between zones on its own
- Battery swaps with other Worx 20V PowerShare tools
- Narrow 8.7 in deck needs more passes than wide-deck rivals
- Depends on cellular or Wi-Fi data for RTK Cloud corrections
- Worx doesn’t publish noise or waterproof ratings for this line
- 37.3 lb is heavy to carry between lawns
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Coverage | |
|---|---|
| Lawn size (rated) | 0.25 acres (10,900 sq ft) |
| Max slope | 84% (40°) |
| All-wheel drive | Yes |
| Charge time | 1 h 20 min |
| Battery | 20 V 4 Ah |
| Navigation | |
| Navigation | RTK + vision |
| Boundary wire needed | No |
| RTK station | Not needed or sold separately |
| Obstacle avoidance | Stereo camera with Vision AI |
| Multiple zones | Yes |
| No-go zones | Yes |
| Cutting | |
| Cutting width | 8.7 in (221 mm) |
| Cutting height | 1.6–3.5 in |
| Height adjustment | In the app |
| Blades | 3 blades on a self-leveling disc |
| Edge mowing | Cut-to-Zero offset blade |
| Smart features | |
| Connectivity | Wi-Fi, Bluetooth |
| Rain sensor | Yes |
| Anti-theft | 24/7 anti-theft monitoring with Find My Landroid module |
| Build | |
| Weight | 37.3 lb (16.9 kg) |
| Warranty | 3 years |
Alternatives in this size
For quarter-acre yards with heavy tree cover or tight spaces, where adding LiDAR to RTK is worth the premium over the M9.
Amazon $1,399 Anthbot $1,399For small, flat, open lawns where a low price matters most. Bumpy or shaded yards will get better results from a LiDAR model.
Amazon $689.99 Anthbot $679Compare
Compare the Worx Landroid Vision Cloud 4WD 1/4 Acre (WR341) with any other robot lawn mower →
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