Comparison ECOVACS DeeBot Ozmo 900 vs ECOVACS DeeBot Ozmo 930

The cleaning method determines whether the robot can only collect dry debris or also wipe the floor covering with water, and which methods are available for this.

— Dry. The robot cleans the floor with brushes and an airflow, directing dust, crumbs, hair and pet fur into the dust container. This option is suitable for carpets and hard floors, but does not remove stains and marks from the floor.

— Dry and wet. The device combines debris suction with floor wiping using a damp attachment. Depending on the design, this may be a simple cloth or an active washing module that can better handle fresh stains and shoe marks.

— Side brushes. Small rotating elements that sweep debris along walls, near furniture and out of corners towards the main suction opening. One side brush on the edge of the body sweeps debris along walls, near furniture and out of corners towards the central suction channel. This design is usually sufficient, as the robot most often moves along obstacles with one particular side. Two brushes operate on both sides of the body and cover a wider strip of floor in one pass. This setup is especially convenient when moving along walls and between furniture, although on smooth floors fast brushes can sometimes scatter light debris.

— Extendable brush. A mov...able side brush automatically extends beyond the body when cleaning corners and areas near walls. Compared to a conventional fixed design, it reduces uncleaned areas where the robot body cannot get close enough.

— Turbo brush. A motorized module at the bottom of the robot that picks up debris and directs it into the suction channel. The working part may consist of a roller with bristles, rubber blades, or a combined surface. This system collects pet fur, hair and dirt from carpets more effectively than a simple suction opening, but bristled elements need regular cleaning to remove tangled hair.

— Floor scrubber. An active washing module with rotating mops or a roller that does not simply glide over the floor but mechanically scrubs away dirt. This system removes stains and marks better than a regular cloth.

— Extendable floor scrubber. One of the rotating mops shifts to the side and extends beyond the robot body. This allows the floor to be wiped closer to skirting boards, furniture legs and corners, where a standard fixed floor scrubber leaves a narrow dry strip.

— Vibration wiping. The washing platform rapidly moves the cloth back and forth, increasing friction against the surface. In terms of effectiveness, this option is between a passive cloth and rotating mops, effectively removing light stains and marks.

— Cloth wiping. A damp fabric attachment is fixed under the body and pulled across the floor as the robot moves. This simple solution is suitable for regular removal of fine dust and fresh marks, but barely scrubs off dried dirt.

Measured in Pa, this indicator describes the robot vacuum cleaner's suction pressure: the higher it is, the easier it is for the device to pick up heavy debris and clean carpet pile. Values around 2,000–4,000 Pa are usually sufficient for regular cleaning of smooth floors, while 6,000–10,000 Pa and above are better suited for collecting hair, sand, and dirt from carpets or floor joints.

The dustbin capacity indicates how much dry debris fits in the robot vacuum’s built-in container before it needs to be emptied. Models with a 200–300 ml capacity are suitable for a small apartment and frequent cleaning cycles, while a 400–600 ml capacity is more convenient for larger areas, pets, or lots of hair. For robots with a self-emptying station, the size of the internal container is less important, as debris is automatically transferred to the docking station’s collection bin.

The tank capacity determines the water supply for moistening the pad, rotating mops, or cleaning roller. Compact tanks of around 200 ml are suitable for regular wiping of small areas, while 300–500 ml tanks allow fewer interruptions for refilling during cleaning.

A function that automatically adjusts suction power based on the type of surface or the amount of detected debris. On carpets or heavily soiled areas, the robot increases power, while on smooth floors it reduces it to save battery life and reduce noise. Automatic power adjustment helps maintain cleaning quality without constantly selecting the mode manually.

Cleaning area restriction lets you prevent the robot vacuum from entering certain rooms or selected floor areas. This is useful near pet bowls, fragile items, wires, children’s play areas, or surfaces that should not be wiped with a wet attachment. There are various methods.

— Laser sensor. A separate accessory that creates an invisible boundary — the robot detects it with its sensors and does not cross it. It can be moved between rooms, but the device takes up floor space and usually requires separate power.

— Magnetic tape. A strip is placed on the floor or under a thin covering, creating a physically defined no-go line. This is a simple and reliable method, but the tape may be noticeable in the interior and only restricts the area where it is laid.

— Mobile app. No-go zones and virtual walls are applied directly to the saved map of the room. This option does not require additional accessories, allows you to quickly change boundaries, and is usually the most convenient for regular use.

Voice assistant lets you control the robot vacuum cleaner with short commands via a compatible smart speaker, smartphone, or smart home system. You can use your voice to start and stop cleaning, return the device to the docking station, and on some models, select a room or operating mode. This feature is especially convenient when your phone is not nearby, but the set of available commands depends on the robot model and the supported platform.

Battery capacity indicates the amount of charge available to the robot vacuum for navigation, motor operation, brushes, and the mopping system. A higher-capacity battery can potentially provide longer runtime, but it does not allow the exact cleaning time to be determined without considering the device's power consumption. Operating time is more strongly affected by the selected mode, suction power, floor type, use of mopping pads, and frequency of returns to the docking station.

Battery life determines how much area the robot vacuum can clean before returning to the docking station. Actual performance depends on the selected mode, suction power, floor type, operation of the mops or roller, and layout complexity. Therefore, the stated maximum time is usually achieved in a gentle mode and will be noticeably shorter during intensive cleaning.