Dreame L40 Ultra

The 3.2 L dust bag holds weeks of debris before replacement, and the 4.5 L clean and 4 L dirty water tanks last many sessions. You mostly just refill clean water and empty dirty water occasionally.

At 4.1 inches tall, the robot slides under most low sofas and cabinets. It clears obstacles up to 22 mm, so it climbs typical door sills and room transitions without getting stuck.

Yes. The dock washes the mop pads with water heated to 149°F and then air-dries them, which prevents damp, musty odors between cleaning runs.

It supports no-go zones and stores multi-level maps for up to 4 floors. You can block off areas and direct it to specific rooms through the app.

It offers built-in voice control plus Amazon Alexa, Google Assistant, and Apple. That lets you start, stop, or schedule cleaning with whichever smart-home platform you already use.