Here's the quick answer: the Roborock S8 MaxV Ultra mops. The standard Roomba j9+ doesn't.
If you want mopping from iRobot, you need the Roomba Combo j9+, which is a different, more expensive product. But even comparing the Combo j9+ to the S8 MaxV Ultra, Roborock wins the mopping game.
What Makes the S8 MaxV Ultra's Mopping Special
It Actually Scrubs
Most robot mops are basically wet Swiffers. They drag a damp pad across your floor and call it cleaning. The S8 MaxV Ultra's mop pads vibrate 4,000 times per minute, actually scrubbing the floor. This matters when you've got dried coffee drips, sticky juice spills, or any mess that's been sitting.
The Mop Lifts Over Carpet
When the vacuum senses carpet, it lifts the mop pads 20mm off the ground automatically. You can vacuum and mop your whole house in one run without wet mops dragging across your rugs. Most robot mops either avoid carpet entirely or require manual mop removal.
It Gets the Edges
That strip along your baseboards that never gets clean? The S8 MaxV Ultra has a rotating side mop that extends out to reach those edges. Less than 2mm from the wall. Most robot mops miss 2-3 inches along every edge.
The Dock Does Everything
The RockDock Ultra sets Roborock apart:
- Washes mop pads with hot water after every cleaning
- Dries them with warm air to prevent mold and odors
- Automatically adds cleaning solution from a 580ml tank
- Cleans its own base tray
With the Roomba Combo j9+, you handle more maintenance yourself.
The Bottom Line
If mopping matters, the Roborock S8 MaxV Ultra is the obvious choice. The standard Roomba j9+ can't mop at all, and even the Combo j9+ can't match the S8 MaxV Ultra's mopping technology or automated dock maintenance.
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How we researched this
Where this comes from: this answer draws on the product's published specifications and the reviews ShopSavvy collected for it, alongside prices from ShopSavvy's price data.
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