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An independent consumer guide to smart homes.

Dreame X40 Ultra VS iRobot Roomba S9 Plus

Dreame X40 Ultra

4.8

iRobot Roomba S9 Plus

3.3
70dB
Noise level
65-75db
Up to 210min
Operating time
120min
200sqm
Maximum surface area
370 estimated
12 000Pa
Suction power
2500Pa
22mm
Threshold height
15mm
300ml
Dust container
400ml

Dreame X40 Ultra

The Dreame X40 Ultra is the latest addition to Dreame's impressive range of robot vacuum cleaners. After testing this robot vacuum cleaner for a few weeks, we can establish that it really lives up to expectations with its advanced features and powerful performance.

With an impressive suction power of 12,000 Pa, the Dreame X40 Ultra is able to absorb even the most stubborn dirt particles. Its AI-based obstacle avoidance system, which uses RGB + 3D structured light, ensures it effectively navigates around obstacles in the home without getting stuck.

The Dreame X40 Ultra comes equipped with a variety of customizable cleaning features. The liftable and extendable side brush allows it to adapt to different floor types and clean even in hard-to-reach corners. In addition, the mop can be extended and removed for easy cleaning, and the vacuum cleaner has a self-cleaning washboard that automatically washes and dries the mop with hot water at 70°C.

The large battery capacity of 6,400 mAh means that the Dreame X40 Ultra can clean your home for a long time without needing to be recharged. Its dust container holds 300 ml, while the water tank has a capacity of 80 ml. The separate tank for clean and dirty water holds 4.5 liters and 4.0 liters, respectively, which allows it to clean large areas without interruption.

In addition to the aforementioned features, the Dreame X40 Ultra also offers the possibility of voice control, making it easy to integrate into your smart home. The function of dirt detection and rewashing of floors with multispectrum sensors ensures that your home is thoroughly cleaned. Auto tank filling and cleaning agent additive make the maintenance of the vacuum cleaner easy and convenient.

With the camera, you can easily monitor your home, either by controlling the robot vacuum cleaner itself with the app or selecting a point on the map for the robot to go to. It may not be the best camera angle because the robot rides along the floor but definitely something we use from time to time.

Dreames app is stylish and well made. Tons of features and settings are available and it's easy to get started. The base station is has a stylish reffled design with gold details and comes in black and white.

Dreame X40 Ultra is a high-performance robot vacuum cleaner that combines powerful suction capacity with intelligent cleaning functions. If you are looking for a reliable and efficient robot vacuum cleaner that can handle everything from daily cleaning to deeper cleaning, the Dreame X40 Ultra is a great choice. However, it comes with a large price tag that is not suitable for all households.

iRobot Roomba S9 Plus

Compared to its predecessor, the iRobot Roomba i7+, the Roomba S9+ has undergone several significant improvements, including a new D-shaped design that allows it to access tight corners and hard-to-reach places more efficiently. A previous problem with Roomba models was that the brushes spun too quickly, often resulting in the dirt spreading instead of collecting up. On the Roomba S9+, this problem has been solved by having the brushes rotate more slowly, increasing its ability to efficiently collect dirt and debris.

Another noticeable improvement is the dual brush on the underside of the Roomba S9+, which has been moved forward and widened. This causes fewer hairs to get stuck and makes it more effective at cleaning even thick carpets.

The Roomba S9+ uses a navigation technology called VSLAM (Visual Simultaneous Localization and Mapping) instead of LIDAR, which is used by many other competing robotic vacuum cleaners. VSLAM uses a built-in camera to map and navigate your home. One advantage of VSLAM is its ability to handle situations where obstacles have fabric hanging down to the floor, which LIDAR can sometimes have difficulty detecting. However, VSLAM is dependent on the lighting conditions in your home, and it may be less effective in dark environments. A combination of both technologies, VSLAM and LIDAR, would perhaps have been an optimal solution.

It is also worth mentioning that iRobot, the manufacturer of the Roomba, is now owned by the tech giant Amazon, which acquired the company for about $17 billion. This acquisition has strengthened Amazon's presence in the smart home market and positioned them as a leading player in the sector.