The S8 Pro Ultra is the previous-generation Roborock flagship and is still the pick if mopping is your priority and you want a vibrating sonic pad rather than a spinning pad. Vacuum Wars saw 'some of the best results we've seen so far' on dried-on mopping tests. Suction has been eclipsed by newer competitors, but for hard-floor-dominant homes the trade-off favors the mop.
Full review
Mopping Performance on Real Spills
The VibraRise 2.0 sonic mop is the standout feature of the S8 Pro Ultra and is what justifies keeping it in the lineup despite the newer Qrevo Master. Instead of rotating pads, the S8 Pro Ultra vibrates a single rectangular pad at several thousand strokes per minute, which acts more like scrubbing than wiping. Vacuum Wars ran it against the same dried-on coffee, syrup, and ketchup tests they use across the category and reported that 'it delivered some of the best results we've seen so far,' specifically calling out how the vibration loosened baked-on residue that spinning pads only smeared.
Apartment Therapy's long-term reviewer noted that on weekly maintenance cleaning in a home with two kids and a dog, the S8 Pro Ultra consistently left floors with no visible streaks or sticky spots. The trade-off is reach: the rectangular pad can't extend to baseboards the way the Qrevo Master's FlexiArm spinning pad can, so it leaves a roughly 1.5 inch unmopped strip along walls.
The S8 Pro Ultra also has a unique mop-with-the-grain feature that adjusts pad orientation to follow the direction of hardwood plank seams. Vacuum Wars highlighted this as a real differentiator: 'The S8 is the only robot vacuum we know of that has this feature' for reducing streak visibility on long plank runs. On wide-plank engineered hardwood the difference is visible; on tile or vinyl plank it's negligible.
Vacuum Performance and Carpet Handling
Suction is rated at 6,000 Pa, which was flagship territory in 2023 but is mid-pack against 2025-2026 models. RTINGS measured 97.9% debris pickup on bare floors in their tests, which is genuinely strong, but only adequate carpet deep-cleaning performance. The dual rubber-coated brush roll resists hair tangle well, which matters in households with long-haired pets where bristle rollers turn into hair-wrapped tubes within a few cycles.
The mop pad auto-lifts 5 mm to clear carpets, but the lift is smaller than the 12 mm of the Eufy X10 Pro Omni and the 10.5 mm of the Dreame L40 Ultra. On medium-pile rugs the S8 Pro Ultra occasionally leaves a damp track. For hard-floor-dominant homes with only the occasional thin area rug this is a non-issue; for carpet-dominant homes you should look elsewhere entirely (a non-mop dedicated vacuum will beat any combo unit on carpets).
Navigation and Obstacle Avoidance
Roborock's structured-light and infrared obstacle avoidance was class-leading at launch and still holds up well. The S8 Pro Ultra reliably recognizes power cables, socks, shoes, and (importantly for many users) solid pet waste in normal room lighting. Vacuum Wars saw it sidestep all of those in their standard obstacle gauntlet. Low-light performance is the catch: in nearly dark rooms the structured-light projector loses contrast and the robot will occasionally drive over thinner objects. Newer Roborock models added camera-based avoidance to fix this; the S8 Pro Ultra did not get that upgrade.
Mapping uses spinning LiDAR, supports three saved floors, and builds a full house map in about 15-25 minutes. The Roborock app is mature and lets you set per-room suction, water flow, and mop-or-not settings that persist across cycles.
Self-Wash and Self-Empty Quality
The RockDock Ultra is what fully separates the S8 Pro Ultra from cheaper mop-equipped Roborocks. After every cycle the dock empties the dustbin into its bagged compartment, washes the vibrating mop pad with fresh water, drains the dirty water into a separate tank, and air-dries the pad with warm air to prevent the mildew-pad smell that's the failure mode of cheaper self-wash docks. The S8 Pro Ultra was one of the first robots in the category to ship with all of these features integrated.
What it lacks versus the Qrevo Master is the 140 F hot-water wash. The S8 Pro Ultra uses cold water from the clean tank, which is adequate for routine maintenance but not as effective at sanitizing pads in pet or food-spill households. The Trusted Reviews testers specifically noted this as the one feature they wished was present on the S8 Pro Ultra.
App and Smart Home Integration
Same Roborock app as the Qrevo Master, same Alexa/Google/Matter support, same per-room scheduling and persistent settings. The smart-home story is fully mature. Geofencing, voice control, and IFTTT are all wired in cleanly. Apple Home support arrived via a 2025 firmware update through Matter and works for basic start/stop/dock commands.
The off-peak charging feature is a nice power-cost touch for owners on time-of-use electric rates: the dock can be scheduled to only recharge the robot during overnight low-rate windows. It's a minor saving but a thoughtful one.
The Roborock app's room-recognition feature uses the LiDAR map to detect when furniture has been moved and re-classify rooms automatically. In practice this means rearranging your living room doesn't require a full re-map run — the robot just adjusts the existing room boundaries. Reviewers consistently flag this as the kind of polish that distinguishes the Roborock app from cheaper competitors that require full re-mapping after any room change.
Where It Falls Short
The S8 Pro Ultra is now two generations behind Roborock's current flagship lineup. Suction has been outpaced (the Qrevo Master pushes 10,000 Pa, the Saros series goes higher), the styling is dated, and the dock is large at 17.7 inches tall. Pricing is the bigger complication: MSRP is $1,599 but it has not actually sold at that price in over a year. Most months it can be had for $899-$1,100 on Amazon or directly from Roborock, which is much more reasonable for what you get, but be patient and wait for a sale.
The carpet performance ceiling is real. RTINGS specifically flagged that the S8 Pro Ultra is 'disappointing on carpet deep-cleaning' despite the dual rubber brush. If your floors are 50% or more carpet by area, the mop savings are not worth the vacuum compromise.
Who It's Best For
Buy the S8 Pro Ultra if your floors are dominantly hard surface (tile, vinyl plank, sealed hardwood, polished concrete), mopping quality is your priority over vacuum suction, and you want a vibrating sonic mop pad rather than spinning pads. The sonic mop genuinely outperforms spinning-pad designs on dried-on stains, which is the daily reality in many kitchen and bathroom cleaning routines.
Skip it if your floors are mostly carpet (suction is no longer a strength), if you want the newest hardware (look at the Qrevo Master or the Saros line), or if you're not willing to wait for a sale (paying $1,599 MSRP is not the deal this robot represents at $999).
Long-Term Durability and Updates
The S8 Pro Ultra has been on the market since 2023 and the track record is now well-established. Owners report the dual rubber rollers, the VibraRise 2.0 mechanism, and the dock self-wash hardware all holding up across multi-year daily use with no significant failure clusters. The most common consumable replacement is the mop pad itself (every 3-6 months) and the dust bag (every 60 days for single-pet households).
Roborock has continued pushing firmware updates to the S8 Pro Ultra throughout 2024, 2025, and into 2026 — Matter support, improved obstacle recognition, and minor app refinements have all arrived without making owners buy a new model. This kind of long-tail support is unusual in the robot vacuum category and is one of the better reasons to pick the S8 Pro Ultra over a brand with less of a track record. Buying a robot you expect to use for 4-6 years, software support matters as much as the day-one hardware.
Strengths
- +VibraRise 2.0 sonic mop pad vibrates at thousands of strokes per minute and pulls dried-on stains the spinning-pad designs leave behind
- +Mop pad auto-lifts 5 mm to clear short carpets so a single cycle handles both surfaces without re-runs
- +RockDock Ultra empties the bin, washes pads, dries them with warm air, and refills the water tank with no user touch
- +Reactive 3D structured-light obstacle avoidance recognizes cables, socks, and pet waste in normal room lighting
- +Spinning LiDAR mapping with multi-floor support and the same mature Roborock app as the Qrevo Master
Watch-outs
- −6,000 Pa suction is now mid-pack as flagship rivals push past 10,000 Pa
- −Sonic mop pad cannot extend to the very edges of baseboards — no FlexiArm equivalent
- −RockDock Ultra is one of the larger docks in the category at 17.7 in tall
- −Frequently MSRP-listed at $1,599 but rarely actually sells above $1,100 — buy on sale
How it compares
Sonic vibrating pad lifts dried stains better than the Qrevo Master's spinning pads, but the Qrevo Master beats it on suction and edge-cleaning. The Eufy X10 Pro Omni is now a stronger value pick than the S8 Pro Ultra unless you specifically want the sonic mop.
Who this is for
At a glance: Hard-floor-dominant homes (kitchens, bathrooms, tile entryways) where dried-on food, soap scum, and pet messes are the primary cleaning challenge rather than carpet pickup.
Why you’d buy the Roborock S8 Pro Ultra
- VibraRise 2.0 sonic mop pad vibrates at thousands of strokes per minute and pulls dried-on stains the spinning-pad designs leave behind.
- Mop pad auto-lifts 5 mm to clear short carpets so a single cycle handles both surfaces without re-runs.
- RockDock Ultra empties the bin, washes pads, dries them with warm air, and refills the water tank with no user touch.
Why you’d skip it
- 6,000 Pa suction is now mid-pack as flagship rivals push past 10,000 Pa.
- Sonic mop pad cannot extend to the very edges of baseboards — no FlexiArm equivalent.
- RockDock Ultra is one of the larger docks in the category at 17.7 in tall.
Rating sources
“Excels at mopping with its VibraRise 2.0 system and offers a fully autonomous experience with the RockDock Ultra.”
“It delivered some of the best results we've seen so far in dried-on and wet mopping tests.”
“For sparkling floors, the S8 Pro Ultra delivers on its promise.”
Our 4.4 score is the average of these published ratings. Ratings marked * were derived from the reviewer’s written analysis or video transcript — the publisher didn’t print an explicit numeric score, so we inferred one from their own words. Click through to verify. More about methodology.
