Roomba j7+ vs Roborock Q Revo — Which Self-Empty Robovac for Pets?

Pet hair pickup mechanism

Both robovacs use a dual rubber roller brush head designed to resist hair tangle, which is the right call for pet households. The iRobot j7+ uses the same multi-surface rubber rollers that have been on Roomba flagships since the i7; iRobot's product page describes them as tangle-free, and owner reports back that up for short-haired shedding pets. The Q Revo uses a similar dual-roller design that Roborock markets under the DuoRoller name.

On raw pickup, the Q Revo has a meaningful edge: Roborock rates the Q Revo at 5,500 Pa of suction on its product page, compared to iRobot's much vaguer '10X the power-lifting suction' marketing for the j7+. In practice, owners of both report that the Q Revo pulls more visible debris out of medium-pile carpet on a single pass. The j7+ is fine on hard floors and low-pile rugs but needs more passes on plush.

Navigation: camera vs LiDAR

This is the spec gap that decides the comparison for most non-pet households. The Roomba j7+ navigates with a single front-facing camera (iRobot calls it PrecisionVision) plus bump sensors. It works, but it builds the map slowly, gets confused in low light, and re-routes inefficiently when furniture moves. The j7+ wants to see its surroundings, which is also why it occasionally drives into a sock when the room is dim.

The Q Revo uses 360-degree LiDAR, the same technology in self-driving cars. It maps a full apartment in one pass, works identically in pitch dark, and re-routes around obstacles in real time. Roborock's app shows a clean floor plan that updates live; iRobot's app shows a sketchier blob that takes 3 to 4 runs to stabilize. For multi-floor homes the Q Revo's mapping is a different product.

Mopping: Roomba doesn't, Q Revo does

The Roomba j7+ vacuums only. iRobot sells a separate Combo j7+ that adds a mop pad, but the standard j7+ in this comparison does not mop. If hard floors are the dominant surface, that is a real limitation: a vacuum alone leaves the sticky residue that pets, kids, and coffee spills deposit on tile and hardwood.

The Q Revo vacuums and mops in the same pass with two spinning mop pads that lift off carpet automatically. Roborock's product page specifies the mop pads spin at 200 RPM, which produces real scrubbing action rather than the wet-drag pattern of cheaper vacuum-mop hybrids. The base station washes the mop pads with hot water between runs, then dries them to prevent mildew. This is the single biggest functional gap between the two.

Self-empty base differences

Both robovacs ship with auto-empty bases that suck the dust bin into a sealed bag inside the dock. The Roomba j7+ Clean Base holds about 60 days of debris in a single bag, per iRobot's product page. Replacement bags run roughly $20 for a 3-pack on Amazon, which works out to under $5 a month for a typical household.

The Q Revo base does the same auto-empty job but adds the mop wash-and-dry function, plus a clean water tank and dirty water tank for the mopping side. It is a bigger dock that takes more floor space (Roborock lists base dimensions on the product page), but it eliminates the human chore of rinsing mop pads after every run. For a mopping-capable robot, this base is the actual reason the system works.

Who should buy the Roomba j7+

Buy the j7+ if there is a dog in the house that has had even one accident in the last year. The pet waste avoidance is the only feature that matters here, and iRobot's guarantee (replacement robot at no charge if the j7+ runs through pet waste) is real and documented on their support site. No other robovac offers this.

Also buy the j7+ if the household runs mostly carpet and rugs, with limited hard floor. The lack of mopping is not a loss in a carpeted home, and the j7+'s simpler base takes less space. The renewed (refurbished) j7+ models on Amazon at around $150 are also a genuinely strong value if a new $600+ robovac is out of budget.

Who should buy the Roborock Q Revo

Buy the Q Revo if the home is mostly hard floor, or a mix of hard floor and rugs, and there is no dog that has accidents. Mopping plus vacuuming in one pass is a real time savings, the LiDAR mapping is a noticeably better experience day to day, and the self-washing mop base eliminates the most annoying chore that kills mopping robots in year two.

Also buy the Q Revo if the floor plan is larger or multi-level. LiDAR scales to bigger spaces in a way camera navigation does not, and the Q Revo's map management in the Roborock app supports multi-floor saved maps cleanly. The base configurations span roughly $280 to $1,300 on Amazon depending on which dock and accessory bundle is chosen.

Verdict

For most pet households without a dog that has accidents, the Roborock Q Revo is the better robovac and the better value. LiDAR mapping, real mopping, and the self-washing mop base together make a system that does more housework than the j7+ at a lower list price. The j7+ wins on one axis only, but that axis (pet waste avoidance) is decisive for the buyers who need it. Pick based on whether your dog has had an accident in the last year. If yes, j7+. If no, Q Revo.