Smartest navigation with automatic retracting mop
Visit iRobot →The iRobot Roomba Combo j9+ represents iRobot's most advanced combo robot vacuum to date, featuring the company's proprietary PrecisionVision navigation and a truly innovative retractable mop system. After six months of testing in a multi-pet household with mixed carpet and hard floors, the j9+ consistently demonstrated the smartest navigation behavior we've seen — accurately detecting carpet, lifting its mop fully out of contact, and resuming scrubbing once back on hard surfaces. The standout feature is the SmartScrub system that applies downward force of up to 2N while mopping, combined with the auto-retracting mop that physically lifts the pad up and into the robot body — preventing any carpet wetting even on thick pile. The Clean Base auto-empty system pulls debris into a sealed 60-day bag, while the iRobot Home app remains the most polished and intuitive robot vacuum app on the market. At $1,399, the Combo j9+ sits $400 below the Roborock S8 MaxV Ultra but trails on raw suction power. For buyers who prioritize navigation intelligence, app experience, and a guaranteed dry carpet experience, the Roomba Combo j9+ is the smartest choice available.
iRobot's most advanced navigation uses a front-facing camera and structured-light sensor to detect objects on the floor. Successfully identifies and avoids 80+ common obstacle types including shoes, cords, towels, and pet waste.
The mop physically lifts fully into the robot body when carpet is detected — completely eliminating wet carpet risk on thick pile. SmartScrub applies up to 2N of downward pressure and scrubs back-and-forth for genuine mopping action.
The most polished robot vacuum app available — intuitive room mapping, no-go zones, custom cleaning schedules, and seamless integration with smart home ecosystems including Alexa, Google Assistant, and Apple HomeKit.
The Clean Base automatically empties the robot's dustbin into a sealed, allergen-locking 60-day disposal bag. Reduces allergen exposure and cuts manual maintenance to roughly once every two months.
| Suction Power | 100% stronger than base Roomba models |
|---|---|
| Mopping System | SmartScrub with 2N downward pressure |
| Mop Retraction | Full auto-retract on carpet (lifts into body) |
| Navigation | PrecisionVision (front camera + structured light) |
| Dust Bin Capacity | Auto-empties to 60-day Clean Base bag |
| Runtime | ~75 minutes per charge |
| Self-Empty Base | Yes (Clean Base, sealed bag) |
| App | iRobot Home (iOS / Android) |
| Battery | Lithium-ion |
| Connectivity | Wi-Fi 2.4GHz, Bluetooth |
| Smart Home | Alexa, Google Assistant, Apple HomeKit |
| Warranty | 1 year limited |
| Feature | Roomba Combo j9+ | Roborock S8 MaxV Ultra | Dreame L20 Ultra |
|---|---|---|---|
| Suction Power | Strong (100% more vs base) | 6,000Pa | 7,000Pa |
| Mopping System | SmartScrub (2N pressure) | VibraRise 3.0 (3,000 vpm) | Rotating dual pads |
| Mop on Carpet | Full auto-retract (best) | 8mm lift only | Auto-lift |
| Navigation | PrecisionVision AI | LiDAR + RGB Camera AI | LiDAR + AI |
| Self-Cleaning Dock | Auto-empty only | Wash + dry + empty | Wash + dry + empty |
| Runtime | 75 min | 180 min | 180 min |
| Price | $1,399 | $1,799 | $1,099 |
| Best For | Navigation & dry carpet | AI obstacle avoidance | Value & suction power |
The Combo j9+ is ideal for buyers who prioritize smart navigation and a guaranteed dry carpet experience. The full auto-retracting mop physically lifts into the robot body — eliminating any risk of wet carpets even on thick pile. Best for mixed-floor homes with carpet where mop-wetting is a primary concern, and for users who want the most polished robot vacuum app experience available.
For buyers who value PrecisionVision navigation, the auto-retracting mop, and the iRobot Home app, yes. The $400 price gap versus the Roborock S8 MaxV Ultra gets you smarter navigation and a guaranteed dry carpet — but you sacrifice the self-cleaning mop dock, raw suction power, and the longer 180-minute runtime. Buyers who want a true hands-free mop cleaning should opt for the Roborock or Dreame.
The SmartScrub mop physically lifts the mop pad up and into the robot body when carpet is detected — completely removing the pad from contact with the floor. This is fundamentally different from competitor systems that only lift the mop a few millimeters. The result is zero carpet wetting, even on thick pile rugs where 8mm lift systems would still dampen fibers.
iRobot's design philosophy prioritizes reliability and a smaller dock footprint over the self-cleaning mop dock. You'll need to manually rinse the mop pad every 1-2 weeks depending on use. The Clean Base does auto-empty the dustbin, but mop maintenance is manual — a trade-off versus the Roborock S8 MaxV Ultra's fully self-cleaning dock.
The Clean Base extraction cycle runs for roughly 10-15 seconds per empty and produces noticeable noise — roughly 80dB at close range. We recommend scheduling cleanings when no one is home, or placing the dock in a low-traffic area. The cycle only triggers when the robot returns to dock, not continuously.
The iRobot Roomba Combo j9+ is our top recommendation for buyers who prioritize the smartest navigation and a guaranteed dry carpet experience. The PrecisionVision navigation, the full auto-retracting SmartScrub mop, the polished iRobot Home app, and the reliable Clean Base auto-empty combine to deliver the most intelligent combo robot vacuum we tested. Expensive at $1,399 and the mop requires manual cleaning versus competitor self-washing docks, but for carpet-heavy homes that demand zero mop wetting and the best app experience available, the Roomba Combo j9+ is the smartest purchase of 2026.
Try iRobot Roomba Combo j9+ Now →