iRobot Roomba Plus 415 Combo Review: Robot Vacuum and Mop

iRobot spent years as the default name in robot vacuums before losing ground to Chinese rivals such as Dreame, Roborock, Mova, Ecovacs and Narwal, all of which climbed to the top of the category. At the end of 2025, Picea, one of the world's largest robot vacuum ODMs and already the manufacturer behind many iRobot machines as well as models for brands including Eufy (Anker) and Shark, bought the American company outright. The deal was finalised on 23 January 2026, and the new Roomba range born of the iRobot and Picea collaboration launched in the spring with no fewer than eight new models.

That change of ownership places a company that maps, and sometimes photographs, the inside of people's homes under Chinese ownership. iRobot's answer has been iRobot Safe, an independent American subsidiary charged with protecting the data of American and international users. It is worth knowing about before installing any connected robot at home.

The Roomba Plus 415 Combo sits at the heart of the range, in the mid-range class, with a feature list that reads generously on paper.

The Roomba Plus 415 Combo follows iRobot's latest design language: discreet, and unusually compact. The dock uses a fairly conventional upright format, with two water tanks of roughly 3 litres each reached directly from the top, while a removable panel on the front gives access to the 2.5-litre dust bag. The look is restrained but neat, with vertical ribbing across the fascia and a slight transparency over the clean-water tank so its level can be judged at a glance. The tiered arrangement of the components gives the whole thing a modern profile that sits well in a living space. Lower down sits the washing plate, which scrubs the mop pads against small plastic ridges. It is fixed in place, so it cannot be lifted out and rinsed in a sink.

The robot itself is equally low-key, at roughly 30 cm across and 8.35 cm tall. The top surface is completely flat thanks to the absence of a LiDAR turret, leaving only two buttons and a removable cover visible. The sensors sit at the front and rear of the chassis instead, which is what keeps the height down. Underneath there is a single hybrid main brush roller, two mopping pads and one side brush. That side brush extends outwards, as does the right-hand mop pad, so the robot can work closer to skirting boards and walls.

Build quality is appropriate rather than luxurious: the plastics and panel alignment are perfectly acceptable without feeling high-end, which is entirely normal at this level of the market. Robot and dock come in black or white, both in matt plastic that keeps fingerprints and light scratches at bay.

The Roomba Plus 415 Combo is controlled through the redesigned Roomba app, which offers a modern, uncluttered interface and makes the robot easy to get to grips with.

During first-time setup the app asks you to pair the robot with your Wi-Fi network and map your home. That stage passes without trouble, although the robot treats a terrace or balcony seen through patio doors as an extension of the room. Unlike some higher-end models, the 415 Combo cannot identify rooms automatically; they can, of course, be renamed, split or merged by hand. No-go zones can be drawn as well, but there is no way to set the floor type or place furniture on the map.

This is a long way from the deep customisation offered by rival brands, and iRobot has clearly chosen to keep its menus simple rather than overload them. The same restraint shows in the settings, which are limited to how often the mop pads are washed and how often the dust bin is emptied.

Day to day the app is straightforward to use, even if the shortage of options feels disconcerting next to brands such as Dreame or Roborock. It works around Routines, which can include specific rooms and carry different cleaning options for each of them. You can choose to vacuum or to mop, to do both at once, or to do one after the other. Advanced controls are thin on the ground, though: you can adjust suction across four levels, force a crosshatch pass and enable or disable SmartScrub, which scrubs harder at dried-on marks. Surprisingly, there is no way to apply cleaning settings to every room at once, as each room has to be added to the routine individually and configured on its own.

Once a job is set up, the robot estimates how long the clean will take before it even sets off, which is useful for knowing whether it will finish before guests arrive. During the run it shows its progress on the map along with a projection of the rooms still to clean and an estimated time for each. Obstacles it meets are not marked on the map, however, even when they are successfully avoided.

On paper the specification is respectable for its mid-range class, with 20,000 Pa of suction and a PerfectEdge mopping pad that slides outwards to clean along skirting boards.

For vacuuming, the robot uses a hybrid brush roller together with an arched side brush that extends to sweep dust from along walls and out of corners. In use the results are striking, despite suction figures more modest than some competitors offer. On hard floors, crumbs, dust and other debris are picked up in a single pass, including from tile grout. In a kitchen, spilled salt and dirt in the corners and under the units were removed completely, right up to the skirting boards, helped by the side brush and the robot's small footprint.

Rugs and carpets are vacuumed effectively despite the single roller. The robot automatically lifts its mop pads and increases suction for better results. It cleared most of the dog hair from a hallway rug in a household with a Samoyed, a job that more premium machines sometimes struggle with. Expectations should stay realistic, since this is not a machine designed to pull embedded dirt out of a thick pile, but its capabilities are impressive for its class.

Mopping is conventional as well: two rotating pads, one of which slides out to clean along walls. It is plain water only, and at this point in the range there is no detergent reservoir and no hot-water washing. The execution is good, though, and the robot copes well. Footprints and everyday marks are cleared quickly, as are mishaps such as dried coffee spots or drips of sauce. Stubborn, dried-on stains still call for manual intervention, which is fair enough for its class. There is no manual control over water flow, but the Roomba is not stingy with it and makes sure the floor is properly wetted.

The key is to select the cleaning mode that suits the job, since a single pass may not be enough for difficult marks. There is unfortunately no intelligent mode that lets the robot adapt to the amount of dirt it detects, and no liquid-spill detection either, so spills are simply vacuumed up.

The suction level chosen naturally has an impact on noise. The robot stays reasonably quiet all the same, producing around 65 dB on average. That is audible, but discreet enough to hold a conversation or watch television.

Runtime impresses too, at roughly two hours of work on a single charge. For a robot of this size that is a very good showing, particularly as it may need extra time to cover larger floor areas.

As usual, iRobot avoids a raised LiDAR turret and relies on sensors at the front and rear of the robot. On this model there is no camera either, so there is nothing to pick out obstacles finely or help it locate itself more precisely.

The result is fairly mediocre overall, and it contrasts sharply with the cleaning. The robot moves from room to room without drama and finds its way back to the dock, but it struggles to read its surroundings accurately. It does not blunder into every piece of furniture the way some machines do, yet it still managed to tangle its side brush in the coat of a Samoyed weighing more than 30 kg. It also shed its mop pads on numerous occasions, catching them under furniture or on cables.

Obstacle detection is correspondingly unreliable. Bulky items such as shoes or soft toys are recognised and avoided without trouble, but cables, wires and small objects are not consistently spotted, which can quickly cause problems. Nobody expects a twin HD camera system in this class, but dependable obstacle detection would not have gone amiss; the experience is strongly reminiscent of a 2017-era Roomba, which had to have the floor tidied before every run. The upshot is that this is not the model to choose if children leave toys lying around or there are pets in the house.

On thresholds, the robot has no articulated legs and cannot climb significant steps, although it manages anything up to about 2 cm. Its 8.35 cm height, made possible by the absence of a LiDAR dome on top, does let it slide under most low furniture.

iRobot was overtaken a few years ago by Chinese brands that greatly simplified the upkeep of vacuuming and mopping robots with all-in-one docks. This model claws back some of that ground, with a base capable of emptying the dust bin and servicing the mop.

The dock washes the mop and dries it at 45 °C, and the large 3-litre water tanks provide enough autonomy to clean more than 100 m² without manual intervention.

Even so, both robot and dock need frequent attention if you want to avoid disappointment. The dock's mop washing remains fairly rudimentary, and a 60 °C machine wash once a month, or more often, is useful for keeping the pads genuinely clean. Cleaning the washing plate is straightforward enough, despite the fact that it cannot be removed.

On the robot, the side brush is designed so that pet hair and human hair do not build up around it. The main roller is another matter: it is very prone to tangles, and a weekly clean remains necessary in a home with pets or heavy hair shedding.

Taken as a whole, the Roomba Plus 415 Combo is a strong cleaner in a genuinely compact package, with edge work that outperforms its class, a useful two-hour runtime and a dock that handles the dirty jobs. What holds it back is navigation that feels like a throwback, mop pads that come adrift too easily and maintenance that stays more manual than it should.