ANTHBOT M9 Review

Anthbot M9 specs

• Covers about 0.25 acre (some reviews say 0.3). Needs an RTK antenna near the dock. The M9 Pro adds LiDAR. IP rating not published.
• Reviews disagree on mapping: New Atlas describes a manual drive-around, Reviewed calls it automatic.

Specs are compiled from manufacturer listings and may change between production runs. Confirm on the retailer page before buying.

ANTHBOT M9 video review

Video by There's A Trick For That on YouTube. Independent creator content, shown as a reference. It is not part of our scoring.

The ANTHBOT M9 is one of the cheapest wire-free robot mowers we’d actually trust on a real lawn. For a budget-tier price, you get full-band RTK navigation, dual HDR cameras for obstacle avoidance, and a quiet 58 dB motor, rated for about a quarter acre. Reviewed made it its Editor’s Choice for small lawns. The compromises are a low 2.8” maximum cut height, an RTK antenna to install, and anti-theft features that aren’t confirmed for the US model.

Who the ANTHBOT M9 is for (and who should skip it)

It’s for owners of small, open lawns, roughly 10,000 sq ft or less, who want a dependable wire-free robot without spending $1,000 or more. New Atlas called it an “ideal choice for people with small- to average-sized lawns with little smart-tech experience.”

Skip it if:

• You keep your grass tall. The 2.8” ceiling is too short for tall fescue in summer.
• Your lawn is mostly under trees. RTK needs sky. Look at the M9 Pro (adds LiDAR) or a LiDAR mower.
• You need confirmed theft tracking. It isn’t verified for the US model.
• Your yard is overgrown or full of exposed roots. New Atlas specifically flagged this as a poor fit.

Navigation and setup

The M9 pairs full-band RTK with two HDR cameras. The RTK antenna, which New Atlas likened to “a spaceship on top of a pole,” sits separately from the charging dock and needs an open view of the sky. Satellites provide centimeter-level positioning, while the cameras handle obstacles and help when the signal weakens. Our navigation explainer covers the tradeoffs.

Setup is the M9’s best trick. Anthbot claims about 10 minutes from unboxing to mapping, and New Atlas said that held up even for newcomers. Mapping is a manual drive-around: you steer the mower along your boundary in the app, “like driving an oversized remote-control car,” per New Atlas. You may need to redo the map if the first pass isn’t precise. Reviewed also praised the “easy mapping setup.” Our setup guide covers antenna and dock placement.

One limitation from Basic Tutorials’ hands-on review: RTK signal quality dropped noticeably far from the base station, and the mower once drifted slightly outside its map boundary and got stuck. That’s a reminder to keep the antenna central and the sky view clear.

Mowing performance, slopes and terrain

Reviewers agree the cut is good. Reviewed said it “cuts in clean, U-shaped passes,” and New Atlas described “precise U-shaped patterns that leave neat line marks.” New Atlas reported it handled thick grass, thin weeds, bark and leaf litter. Basic Tutorials measured about 150 m² per hour (roughly 1,600 sq ft).

The M9 is rated for 45% slopes (about 24°) with two-wheel drive. As always, that figure assumes dry, short grass, so treat moderate slopes as fine and steep banks as a no. Check yours with our slope checker.

Obstacle avoidance gets good marks. Reviewed said it detects obstacles as small as 10 by 10 cm, and Basic Tutorials reported garden furniture, toys and pets were avoided without the mower getting stuck. New Atlas noted shadows could in theory confuse the cameras, though its reviewer didn’t see that happen.

Coverage, cutting and edges

The 7.9” deck is narrow, but that’s typical for a quarter-acre robot. Anthbot rates it for about 0.25 acre (some reviews say 0.3). Height adjusts electrically from 1.2” to 2.8”, and New Atlas noted you can change it mid-job. The low maximum is the real limitation. If you mow cool-season grass at 3.5” or more in summer, this isn’t your mower.

Reviewers flagged a few rough edges in the results. Reviewed listed “grass clippings left behind” and “battery may not last a full mow” as cons. Basic Tutorials saw occasional unmown strips that needed a second pass. Plan on string-trimming fence lines and beds.

App, connectivity and anti-theft

The app is simple and built for newcomers, with live monitoring and multi-zone scheduling. Basic Tutorials counted support for up to 20 zones and noted the map is stored on the mower, so it can keep working if your Wi-Fi drops.

Anti-theft is the gray area. European reviews mention a geofence alarm and an optional 4G service with an annual fee (about €40 a year in Basic Tutorials’ test), but we can’t confirm US 4G support or tracking for the M9. If that matters, read the current listing carefully, or consider the Navimow i105N, which includes GPS tracking. Our theft protection guide covers other options.

Ownership notes

• Noise. About 58 dB, quiet enough that New Atlas called it impressively so.
• Weather. Anthbot doesn’t confirm an IP rating for the M9. See our rain guide and consider a dock cover.
• Brand maturity. ANTHBOT is a newer brand than Segway or WORX, so long-term parts and support are less proven. Our how long robot mowers last guide covers what to check.
• Price. It’s often on sale below its regular price. Prices move.

How it compares

The Segway Navimow i105N / i110N is the closest rival. It’s slightly cheaper, uses antenna-free network RTK and includes GPS tracking, but it’s only rated for 30% slopes. The Navimow i2 AWD adds AWD and 4G tracking for a bit more. The eufy E15 / E18 needs no antenna at all but relies on cameras alone.

For more, see our best budget robot lawn mower and best robot mower for small yards guides.

Bottom line

The ANTHBOT M9 is a strong starter robot for an open quarter acre. It sets up fast, cuts neatly and runs quietly, at a price that undercuts most of the field. Keep it on lawns with good sky view and moderate slopes, and be realistic about the 2.8” height limit and unconfirmed anti-theft. It sits in the budget tier, and prices change often, so check today’s price.

Check the current price on Amazon

Featured in our guides

• Best Budget Robot Lawn Mowers (2026): Wire-Free Picks Under $900, $1,200 and $1,600
• Small Flat Yard Robot Mowers 2026: YUKA Mini 2 vs Navimow i105N vs eufy

Sources

• newatlas.com
• reviewed.com