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Verdict: The Roborock S8 Pro Ultra remains a capable premium robot vacuum-mop for mixed floors, pet hair and hands-off maintenance. Its RockDock Ultra empties dust, washes and dries the mop, refills water and cleans itself. However, it is no longer an automatic winner in every category: newer robots clean edges better, wash mops with hot water, avoid clutter more intelligently or offer newer automation. Buy it when substantially discounted—rather than at a price close to a current flagship.
What the S8 Pro Ultra still does well
Roborock positioned the S8 Pro Ultra as a flagship all-in-one cleaner. It combines spinning LiDAR mapping, structured-light and infrared obstacle sensing, DuoRoller Riser twin rubber rollers and VibraRise 2.0 sonic mopping. Roborock rates suction at 6,000Pa, but that specification is not a substitute for real cleaning results.
Its lasting advantage is convenience. The robot can vacuum and mop according to room-specific rules while the dock handles most routine servicing. The mature app is also unusually configurable. The hardware is older than the S8 Max generation, though, and the model lacks several newer features.
The RockDock Ultra is the main reason to buy it
The dock automatically empties the robot’s dustbin, washes the mop, dries it with warm air, refills the robot’s water tank and self-cleans its lower tray. Roborock claims up to seven weeks between dust-bag changes and enough clean water for more than 300 square metres (about 3,230 square feet) of mopping under its stated conditions (Roborock’s product information).
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Those are maximum manufacturer claims, not guarantees. You still need to:
- Empty the dirty-water tank and refill clean water
- Replace the dust bag and mop pads
- Wash filters and inspect the rollers, wheels and brush ends for hair
- Clean the dock wash tray and drainage areas
- Deal with odour if drying is interrupted or the dock becomes dirty
“Self-cleaning” therefore means automated maintenance functions, not zero maintenance. Pet owners will usually need to inspect the brush assembly more often.
Vacuuming performance by floor type
Hard floors
Independent testing finds good everyday pickup of dust, crumbs, rice and larger debris on hard floors. The twin rollers help collect hair and distribute contact across the floor. The limitation is coverage: debris left tight against walls and in corners can remain, so a second pass or occasional manual edge cleaning is sensible. Vacuum Wars reported strong hard-floor pickup, while RTINGS rates this aspect as good.
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Carpets
The S8 Pro Ultra is better at routine surface cleaning than at extracting deeply embedded grit. Vacuum Wars described deep-carpet performance as only above average and found crevice pickup disappointing. RTINGS likewise reports that fine material can remain in carpet fibres, along edges and in corners. Low-pile carpets are a more comfortable fit than thick or heavily soiled carpet, and high-traffic areas may need a scheduled second run.
Pet hair
This is one of the strongest reasons to choose the model. RTINGS found that the twin brushrolls removed nearly every trace of pet hair from carpet in its testing. Long human hair and animal hair can still wind around brush ends, and a robot cannot replace manual cleaning of stairs, upholstery or inaccessible edges.
Mopping: aggressive scrubbing, ordinary-temperature dock washing
VibraRise 2.0 uses two vibrating mop modules. Roborock states up to 3,000 scrubs per minute, more than 6N of pressure and up to 5mm of lift (manufacturer specifications). Vacuum Wars recorded very strong wet-mopping and dried-stain results.
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It is well suited to daily footprints, dust, light dried spills and kitchen maintenance. It is not a substitute for hand-scrubbing thick grease, heavy grout buildup, large wet spills or sticky deposits. RTINGS’ comparison found the standard S8’s VibraRise system slightly better on stains in its own testing, so the Pro Ultra’s higher price does not guarantee superior results on every mess.
The mop normally lifts when carpet is detected. Vacuum Wars generally found rugs dry, but noted that adjoining rug edges can occasionally become damp. Create no-mop zones for valuable or delicate rugs, test transitions under supervision and use vacuum-only cleaning where protection matters most. Unlike the S8 Max Ultra and S8 MaxV Ultra, the Pro Ultra does not wash its mop with 60°C hot water (Roborock’s comparison).
Navigation and obstacle avoidance
Spinning LiDAR produces quick maps and efficient routes. Reactive 3D sensing uses structured light and infrared imaging, and Vacuum Wars reported a 9/12 obstacle-avoidance result in its testing. The system does not use an RGB camera, which is useful if you do not want a visual camera on the robot.
It is not object-proof. Thin cables, socks, pet toys, transparent items, reflective surfaces and clutter around chair legs can still cause misses. RTINGS considers obstacle handling acceptable but says newer camera-equipped models such as the S8 MaxV Ultra provide a more advanced system. No RGB camera also does not mean no data collection: the robot still communicates with its app and cloud services, so review the current privacy policy separately.
Rank #4
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The app makes routine cleaning genuinely configurable
Roborock’s app supports room selection, zones, no-go lines, virtual barriers, scheduling, multi-floor maps, 3D maps and room-specific vacuum and mop settings. You can, for example, vacuum carpet bedrooms, mop a kitchen at a higher intensity and exclude a play area from a scheduled run. Vacuum Wars also reports controls for mop-wash and auto-empty frequency and suggested no-go zones.
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Labels and menu paths can change with firmware and region, so check the current app version when setting up a new unit. Newer S8 Max models add Smart Plan and extra area controls such as Add Area and Skip Area that are absent from the Pro Ultra (official comparison).
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Fit, placement and ownership checks
Under-furniture clearance
RTINGS measured a lowest cleared height of 10.0cm (3.9in). It can pass under some sofas and beds but may not fit beneath low media consoles or TV stands. Measure every area you expect it to clean before buying.
Best Value
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Dock space
Roborock recommends a hard, flat position against a wall with at least 0.7m (2.3ft) clear in front and 0.5m (1.6ft) above (placement guidance). Provide a nearby outlet, easy access to both water tanks and ventilation for drying noise. Avoid direct sunlight and excessive moisture.
Published capacity figures
Roborock’s comparison lists a 3.5L clean-water tank and 200ml onboard tank. Dustbin capacity is inconsistent in published material: Roborock lists 350ml, while Vacuum Wars lists 470ml. Treat the regional specification as unresolved rather than using either number as a buying advantage.
How it compares with newer choices
| Model or family | Why consider it | Why the S8 Pro Ultra may still win |
|---|---|---|
| Roborock S8 MaxV Ultra | RGB-camera hazard avoidance, extendable side brush and mop, stronger suction, hot-water washing, voice assistant and remote viewing | Lower discounted price and camera-free sensing |
| Roborock S8 Max Ultra | Hot-water washing, Smart Plan and newer dock automation | Better value when those additions are not important |
| Roborock Qrevo family | Often similar hands-off ownership for less, depending on generation | Twin rollers are a meaningful pet-hair advantage |
| Roborock Qrevo Curv | Stronger hard-surface and stain performance with extendable edge hardware, according to RTINGS | More suitable for substantial carpet and pet hair |
| Dreame L10s Ultra | RTINGS reports more consistent hazard avoidance | Roborock app ecosystem, camera-free sensing and twin rollers |
Current rankings change quickly; TechRadar’s buying guide now places newer models ahead of older S8 products (current guide). Do not treat the S8 Pro Ultra’s older “best robot vacuum” verdict from Vacuum Wars (review last updated August 2024) as a complete 2026 market ranking.
Buy it when the discount is substantial
Vacuum Wars displayed a $399.99 price signal on August 18, 2026. That was not verified against Roborock’s US store, so confirm the live regional price before ordering (price and testing page). At a deep discount, its dock, pet-hair pickup, mapping and mixed-floor competence make a persuasive package. At a price near a newer flagship, its missing hot-water washing, edge hardware, camera-assisted avoidance and newer automation are harder to justify.
Who should buy the S8 Pro Ultra?
- Homes combining hard floors, rugs and moderate carpet
- Pet owners prioritising hair pickup
- Buyers who want automatic emptying, mop washing, drying and refilling
- Users who value detailed room-by-room app control
- People who prefer LiDAR and non-RGB sensing
- Homes with approximately 4in or more clearance where under-furniture cleaning matters
Who should skip it?
- Anyone demanding the best edge and corner cleaning
- Homes dominated by thick, deeply soiled carpets
- Cluttered rooms full of cables, toys and small fabric items
- Buyers specifically wanting hot-water mop washing, remote viewing or the newest automation
- Anyone without room for the large dock or who expects maintenance-free ownership
The Bottom Line
The S8 Pro Ultra is a strong discounted buy for pet-owning households with mixed floors and a suitable dock location. It is not the unequivocal best all-round robot vacuum in 2026: pay extra for a newer model only when its edge cleaning, hot-water washing, obstacle avoidance or automation directly addresses your priorities.
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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