Roborock's Qrevo Curv 2 Flow is the ultimate robot mop—if you don't have corners or walls

At a glance:

• Roborock's Qrevo Curv 2 Flow brings a powerful 10.5-inch roller mop system with 15 newtons of downward pressure to the mid-tier market at $1,000
• Despite impressive mopping capabilities, the robot struggles with edge cleaning and corners, leaving gaps of up to 8 inches in some tests
• The vacuum features 20,000 pascals of suction power, can clear 4-centimeter thresholds, and uses LiDAR and cameras for navigation

Design and Specifications

The Qrevo Curv 2 Flow represents Roborock's return to basics after exploring robots with gripper arms and stair-climbing capabilities. Positioned as a more affordable alternative to the original Qrevo Curv (which launched at $1,600), this new model comes in at $1,000, making room for the forthcoming Saros 20 flagship. Despite the lower price point, the Curv 2 Flow offers noticeable improvements over its predecessor in most key areas.

The vacuum's suction power has been increased to 20,000 pascals, up from 18,500 Pa in the original model. It retains the excellent DuoDivide Anti-Tangle brush, which is split in the middle and funnels long hair and string into its central vacuum intake. The robot maintains its ability to clear thresholds up to four centimeters (about 1.58 inches) and uses a combination of LiDAR and cameras for navigation. The distinctive curved docking station from the original model returns, cleaning the mop with 167-degree Fahrenheit water to reduce bacterial growth.

The Revolutionary Mopping System

The most significant upgrade in the Qrevo Curv 2 Flow is the new "SpiraFlow Roller Mop" system. This innovative design features a wide 10.5-inch roller mop that resembles a paint roller, spinning at 220 rpm while exerting substantial downward pressure. The circular pad system on the original Qrevo Curv applied about 6 newtons of force, while the Curv 2 Flow delivers more than twice that pressure at 15 newtons. The mop can extend approximately 2 inches outward from the right side of the robot, theoretically allowing it to clean within 0.4 inches of walls and furniture.

One of the mop's most compelling features is its built-in scraper, which funnels dirty water into an onboard dirty water tank. Unlike conventional robot vacuums that must return to their dock between mopping sessions to wash their mop, the Curv 2 Flow's system continuously self-cleans as it operates. This prevents the robot from simply pushing dirty water around, which can cause streaking and other cleaning issues. The wider roller design also makes the mopping process more efficient, requiring fewer passes and completing the job faster.

Smart Navigation and Sensors

The Curv 2 Flow incorporates several intelligent features to enhance its cleaning performance. The mop includes sensors that can detect when it needs to revisit an area, theoretically providing additional attention until the cleaning job is complete. When the robot senses it's moving over carpet, the mop lifts by more than half an inch, and the "Roller Shield" cover extends around the roller to keep carpet fibers dry. This intelligent system helps prevent water damage to carpets while maintaining effective mopping on hard surfaces.

Setup proved straightforward in testing. Users simply scan the QR code on the vacuum via the app, fill the clean water tank, and instruct the robot to map the home. For a one-bedroom apartment, the mapping process took approximately five minutes. While the mapping is generally accurate, floor-to-ceiling mirrors and sliding glass doors can create phantom spaces in the map, which require manual editing. Users will also need to draw boundaries between rooms and name them to enable voice commands like "vacuum the bedroom." The robot struggles to accurately identify rug locations, so manual verification is recommended to prevent unwanted mopping on carpeted areas.

Cleaning Performance

In practical testing, the Qrevo Curv 2 Flow demonstrated impressive cleaning capabilities on hard floors. The vacuum excelled at picking up stray hairs from laminate flooring and sand from medium-pile rugs. It performed admirably through a standard test of challenging debris including goldfish crackers, Tic-Tacs, spices, olive pits, and pistachio shells. While the robot managed to pick up most of the pistachio shells, they proved to be the most difficult debris to handle. It crushed only one cracker during testing and subsequently vacuumed up most of the debris.

Notably, this model departs from most of Roborock's previous robot vacuums by featuring two sweeper brushes up front that help pull debris into the central roller brushes. However, neither brush can extend outward from the robot's body as in previous models, creating a significant limitation. This design choice results in the robot struggling to sweep dirt out of corners, leaving approximately 1.5 diagonal inches unswept, and failing to clean edges as reliably as competitors. The mopping performance, however, where this robot truly shines, effectively removes dried-on stains like BBQ sauce, milk, and mayo from hard surfaces.

Limitations and Concerns

Despite its strengths, the Qrevo Curv 2 Flow exhibits several performance inconsistencies, particularly around edges. Even with the mop extending from the robot's body, tests revealed inconsistent results—sometimes the mop got within half an inch of walls, while other times it left 8-inch gaps. This inconsistency couldn't be reliably reproduced, suggesting potential firmware issues that might be addressed in future updates. Corner cleaning performance remains poor, with the robot failing to effectively clean these areas.

Another puzzling design choice is the removal of the mop-only mode, which seems counterintuitive given the mop is this model's flagship feature. Roborock appears to be pushing users toward its AI SmartPlan mode, but this approach has drawbacks. When encountering a large wet mess, the robot tends to drive over it before recognizing the need for special handling. Additionally, the front sweeper brushes drag through wet substances, requiring manual cleaning when they become clogged with debris like BBQ sauce. The robot also struggles with object recognition, having ingested a black USB-C cord and a black sock during testing—concerning given that cords represent a significant hazard for these devices.

Physical Considerations

The Qrevo Curv 2 Flow is one of the tallest robot vacuums on the market, standing at 4.7 inches. This makes it 0.6 inches taller than the original Curv model and a substantial 1.5 inches taller than the slim Saros line. For users with low-clearance cabinets or furniture, this height limitation may prevent the robot from cleaning underneath certain areas. The increased height also contributes to the robot's bulkier profile compared to some competitors.

Battery life represents another significant limitation. While the Curv 2 Flow can quick-clean a 650-square-foot apartment in one pass using less intensive modes, selecting "Vac followed by Mop" with higher power settings may drain the battery before completion. When this happens, the robot requires nearly three hours to recharge and continue cleaning—a considerable drawback for users with larger homes or those who prefer uninterrupted cleaning cycles. The long recharge time may necessitate breaking up cleaning schedules, which can be managed through the app but adds inconvenience.

Value Proposition

Overall, the Roborock Qrevo Curv 2 Flow presents a solid mid-range option in the robot vacuum market, offering impressive mopping capabilities at a competitive price point of $1,000 (particularly when available on sale). For users with predominantly hard floors, this model's powerful roller mopping system may make it the ideal 2-in-1 cleaning solution. The innovative self-cleaning mop system and substantial downward pressure deliver cleaning performance that surpasses many competitors in the mid-tier segment.

However, the robot's limitations around edges and corners, combined with its height and battery constraints, make it less suitable for users with complex floor plans or furniture arrangements. Future firmware updates addressing the edge cleaning inconsistencies would significantly improve the product's value proposition. For now, potential buyers should carefully consider their specific cleaning needs and home layout before investing in this otherwise impressive cleaning appliance.