iRobot Roomba Combo j9+ Review
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Quick verdict
The Roomba Combo j9+ (official name: Roomba Combo j9+ Auto-Fill Robot Vacuum and Mop) is a premium vacuum-mop with a dock that empties the bin and refills the mop tank. iRobot lists it at $1,399.99 but shows it as available at select retailers and not currently available on irobot.com, so check stock before you plan around it. Specs below are from the maker page, not our own testing.
Key specs (from the maker page)
- Robot: 3.4 x 13.7 x 13.7 in; 8.9 lb; lithium-ion battery
- Clean Base Auto-Fill Dock: 15.8 W x 16.4 D x 16.3 H in; 21.9 lb; empties debris for up to 60 days and refills liquid for up to 30 days
- Cleaning: 4-stage system (dual multi-surface rubber brushes, edge-sweeping brush, power-lifting suction that iRobot calls 100% stronger, and SmartScrub); SmartScrub downforce 1.16 lb
- Auto-Retract mop lifts to the top of the robot on carpet
- PrecisionVision obstacle avoidance and the P.O.O.P. pet-waste promise
- iRobot OS and Dirt Detective; works with Alexa, Siri and Google Assistant
- In the box: robot, Clean Base, extra filter, extra edge brush, extra mop pad, extra bag, line cord
- Not listed on the page: suction in Pa, runtime, bin/tank volume, warranty
Who it is for
Pet owners and mixed-floor homes that want a premium vacuum-mop with a dock that stays out of the way for weeks. iRobot lists PrecisionVision obstacle avoidance, the Pet Owner Official Promise (P.O.O.P.) for pet-waste avoidance, dual rubber brushes that resist hair tangles, and an Auto-Retract mop that lifts to the top of the robot on carpet. The Clean Base Auto-Fill Dock empties debris for up to 60 days and refills liquid for up to 30 days. It works with Alexa, Siri, and Google Assistant. Best if you can find it at a select retailer and the price fits a high-end budget.
Who should skip it
Skip it if you are shopping under a few hundred dollars — iRobot lists $1,399.99. Skip it if you need published suction in Pa, runtime minutes, or bin/tank volumes before you buy; those are not on the product page. Skip it if you need to order from irobot.com today — the page shows available at select retailers and currently not available on the maker site.
Vs alternatives
Compared with the Roborock Q7 Max on this site, the j9+ is the hands-off dock and carpet-safe mop-lift pick. The Q7 Max leans on PreciSense LiDAR mapping and 30 water-flow levels at a much lower maker-listed price, but without a self-empty/refill dock in the box. Choose the j9+ when dock autonomy, Auto-Retract mopping, and pet-waste avoidance claims matter most; choose the Q7 Max when mapping features and a lower sticker price matter more.
See also Best Robot Vacuums of 2026 and How to Choose a Robot Vacuum.
FAQ
Will it mop over carpets? No. iRobot says the Auto-Retract Mopping System lifts the mop to the top of the robot so rugs and carpets stay dry.
What is Dirt Detective? Per iRobot, Dirt Detective builds a cleaning plan from how often rooms are cleaned and how often dirt is detected, then prioritizes dirtier rooms and optimal settings when you start that mode.
Does it avoid pet waste? iRobot says PrecisionVision Navigation recognizes and avoids pet waste (and cords, shoes, socks, toys), backed by the Pet Owner Official Promise (P.O.O.P.).
What does the Clean Base Auto-Fill Dock do? Empties debris for up to 60 days and refills liquid for up to 30 days, with storage for extra bags and mop pads, per the maker.
What is SmartScrub? An optional mopping mode that mops back and forth with 1.16 lb of downforce pressure (maker figure).
Does it work with voice assistants? Yes — Alexa, Siri, and Google Assistant-enabled devices, per iRobot.
Bottom line
On paper, the Roomba Combo j9+ is a premium 2-in-1 built around a long-running Auto-Fill dock and carpet-safe mop lift. Confirm retailer stock and the live price before you plan around it. This is a spec-based first look, not a hands-on test.
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