Review: The Robot Vacuum Has Become a Surveyor

It was hired to push dust around

The robot vacuum arrived in our homes with the dignity of a Roomba and the career prospects of a janitor: a disc that bumps into table legs, sheds hair from its brush, and dies under the sofa. That was the deal. We accepted a mediocre clean in exchange for not thinking about the clean at all.

Something odd has happened since. The machines have not improved at vacuuming nearly as much as they have improved at knowing where they are. A modern unit no longer behaves like a blind animal. It behaves like a clerk with a clipboard — one that enters every room, measures it, names it, and files the drawing somewhere we do not entirely control.

Interpretation: the robot vacuum was never really a cleaning device with a map attached. It is a mapping device with a cleaning attachment, and we only ever read the job description from the wrong end.

What the thing actually does in 2026

Fact: current mid-range and flagship models use a rotating lidar turret or an upward-facing camera (or both) to build a metric floor plan of the home, then store it — usually in the manufacturer's cloud — as a persistent object: rooms, walls, furniture footprints, no-go zones, virtual walls, carpet thresholds. The plan survives firmware updates, moves, and new floors. Some units now label rooms automatically and several have added a mechanical arm for picking up small obstacles, which is either a convenience or an admission that the floor was never really the robot's problem.

Fact: obstacle recognition has quietly become the headline feature. Cameras on the underside and front classify cables, socks, pet waste, chair legs and shoes. Classification requires images. Images require storage, training pipelines, and human review somewhere in the supply chain. In 2022, Reuters reported that frames recorded by Roomba models — including shots of people in their homes — had ended up on online forums via third-party data-annotation contractors. Amazon's attempt to buy iRobot collapsed in early 2024 under European regulatory pressure. Security researchers have, in separate incidents, disclosed vulnerabilities in competitor brands that allowed unauthorised access to robots and their camera feeds.

Fact: the robot's primary output is now downloadable: a top-down plan you can export, screenshot, and — more usefully — hand to a contractor, a furniture retailer, or an insurer.

The floor plan is the product

Interpretation: a vacuum cleans your floor once. Its map knows something a vacuum has no business knowing: the exact dimensions of every room, the position of the bed, the fact that you are home between 22:40 and 07:10 because that is when the no-go zone by the bedroom stops registering traffic. It knows which room was added last, which door is usually closed, and which corner has not been traversed in six months.

This is surveying — the discipline of measuring a place so it can be described to a third party. The difference between a surveyor and a janitor is that a janitor is paid for the work and a surveyor is paid for the record. Guess which column the revenue sits in.

Interpretation: the app interface gives it away. Manufacturers invest visibly more in the map editor — coloured rooms, drag-to-rename labels, zone highlighting — than in the motor. The map is where the product's identity lives. The brush roll is an afterthought with a warranty.

Interpretation: there is also a quiet reclassification of ownership. Your plan of your home is rendered by their software, stored on their servers, updated by their firmware, and displayed in their app under their terms. You can look at it. Whether you can take it with you, permanently and unencrypted, is a question the industry answers inconsistently — and answers tend to drift in one direction as features move behind accounts and tiers.

Living with it

Fact: on hard floors it still does the job. On carpet it does the job with noise. On cables it does a small crime scene. Every robot vacuum ever sold has eaten at least one shoelace; the newer ones simply photograph the attempt beforehand.

Interpretation: the honest review of the hardware is that cleaning quality has plateaued into competence while mapping quality has not. The result is a slightly strange experience: a machine that performs a mediocre chore with total confidence and a superb chore nobody asked for. It will miss the corner by the radiator and then hand you a plan of your home accurate enough to order a fitted wardrobe.

Interpretation: there is also the etiquette problem. A surveyor announces themselves. A surveyor does not. We object to a doorbell camera watching the street, and we do not object to a disc quietly photographing under the bed, because the disc has a pleasant hum and a name.

Where this goes

Prediction: floor plans will become a standard exchange format for home services. When your cleaner's app, your insurer's risk form, your energy audit and your furniture retailer all request the same file, the vacuum that produced it stops being an appliance and becomes infrastructure. The export button will be the most consequential feature on the device.

Prediction: the robots will be quietly conscripted. Multi-floor mapping and camera patrol modes already exist in various forms; it is a small step from "clean while you are out" to "circulate and report." Expect the same defensive framing the doorbell used: it is not surveillance, it is awareness, and it is off by default until an update changes the default.

Prediction: the subscription will arrive where the map history does — restoring an old plan, holding more than one floor, viewing a week of cleaning records. The clean floor stays included. The memory becomes the upsell.

Verdict

The robot vacuum is a good appliance and a reluctant land-surveyor. It cleans adequately, navigates well, and delivers a document of your home that is more precise than anything you would draw yourself. It is also a camera on wheels with a cloud account, and we have decided, collectively and without much argument, that this is a normal thing to leave roaming the hallway.

Interpretation: buy it for the floors if you like. But read the data page first, because the machine is working two jobs, and only one of them is the one on the box.