Roborock S8 Pro Ultra — Specs & Review

Specifications

Key features

• 6000Pa HyperForce suction
• Dual rubber brush system prevents hair tangles
• Sonic mopping with 3000 scrubs per minute
• Auto-empty, auto-wash, and auto-dry dock
• ReactiveAI 3D obstacle avoidance
• Multi-floor mapping with selective room cleaning
• Works with Alexa, Google Home, and Siri

The Roborock S8 Pro Ultra is a fully autonomous robot vacuum and mop combo with 6,000Pa HyperForce suction, dual rubber DuoRoller Riser brushes, and sonic mopping at 3,000 scrubs per minute. Its RockDock Ultra station handles self-emptying, self-washing, self-drying, and self-refilling automatically, delivering a genuinely hands-free cleaning experience for homes up to 300 sqm.

What Makes It Stand Out

The S8 Pro Ultra's defining feature is the RockDock Ultra — a five-function all-in-one base station that eliminates nearly all routine maintenance. After each cleaning run, the dock automatically empties the dustbin (up to 7 weeks before the bag needs changing), washes the mop pad, dries it with warm air to prevent mould, and refills the robot's water tank. The result is a system that can run daily cycles without user intervention.

The DuoRoller Riser brush system pairs two counter-rotating rubber rollers that agitate debris and self-detangle hair — a meaningful engineering improvement over single-brush designs that require weekly manual cleaning. Combined with 6,000Pa suction, the system performs on hard floors, low-pile carpet, and area rugs without manual setting changes.

Mopping is handled by the VibraRise 2.0 system, which uses two vibration modules oscillating at 3,000 scrubs per minute with over 6N of downward mop pressure. The mop pad automatically lifts 5mm when carpet is detected via ultrasonic sensing, preventing moisture transfer. For heavier soiling, the robot can run a dedicated second-pass mop cycle after vacuuming.

Navigation is managed by PreciSense LiDAR combined with Reactive 3D Obstacle Avoidance, using structured light and infrared imaging to identify and avoid 42 object categories — including cables, shoes, and pet waste — in both bright and dark environments.

Key Specs

Who It's For

The S8 Pro Ultra is best suited to households with mixed flooring — open-plan spaces combining hard floors and area rugs — where the automatic mop-lift feature prevents wet carpet. It is particularly well-matched to pet owners and households with long hair, given the tangle-resistant dual-brush design. The dock's self-maintenance cycle makes it practical for daily cleaning without any user attention beyond occasional bag changes and dock tank management. At its price point, it competes primarily with the iRobot Roomba j9+ Combo and Dreame L10s Ultra, outperforming both on mopping quality while matching them on navigation capability.

Limitations

• The RockDock Ultra requires dedicated floor space of approximately 54 × 47 cm and proximity to a power outlet; the waste water tank requires periodic manual emptying unless connected to a drain.
• Sonic mopping is effective on light-to-moderate soiling but does not match purpose-built floor scrubbers on heavy staining or grout lines.
• Wi-Fi setup requires the Roborock app; offline operation has reduced functionality.
• Not recommended for deep-pile carpet above 10 mm, where suction efficiency decreases.

FAQ

Does the Roborock S8 Pro Ultra work on carpet?

Yes. The S8 Pro Ultra uses ultrasonic carpet detection to automatically lift the mop pad 5mm before crossing onto carpet, preventing moisture transfer. Its Carpet Boost+ system increases suction and engages the DuoRoller Riser brush to agitate carpet fibres for deeper cleaning. It performs well on low-to-medium pile carpet up to approximately 10mm.

How often does the dock need to be emptied or refilled?

The RockDock Ultra's dust bag holds approximately 7 weeks of debris under normal daily use before requiring a bag change. The 2.5-litre clean water reservoir typically lasts 3–5 cleaning cycles depending on floor coverage. The waste water tank requires emptying at a similar frequency unless the dock is connected to a permanent drain.

Can the S8 Pro Ultra vacuum and mop at the same time?

Yes. The S8 Pro Ultra supports simultaneous vacuuming and mopping in a single pass for time-efficient cleaning. It also offers a sequential two-pass mode — vacuum first, then return to mop — for more thorough deep cleaning on hard floors. The mode is selected via the Roborock app.

Is the S8 Pro Ultra compatible with Alexa and Google Home?

Yes. The S8 Pro Ultra supports Amazon Alexa, Google Home, and Apple Siri voice controls via the Roborock app. It connects over Wi-Fi (2.4 GHz and 5 GHz) and supports commands including start, stop, pause, and return to dock. Room-specific cleaning via voice requires prior in-app mapping.

What is the difference between the S8 Pro Ultra and the S8 Plus?

The S8 Plus features a single rubber brush and an auto-emptying dock only. The S8 Pro Ultra upgrades to the DuoRoller Riser dual-brush system, adds the VibraRise 2.0 sonic mopping module (absent on the S8+), and includes the full RockDock Ultra with auto-wash, auto-dry, and auto-refill functions in addition to auto-emptying. The S8 Pro Ultra is the fully maintenance-free configuration in the S8 range.