2-in-1 robot vacuums (aka hybrids or combo models) aren't to be confused with dedicated robot mops like iRobot's Braava Jet, which is often sold in a bundle with a Roomba. Rather, true hybrids are robot vacuums with a water reservoir and mopping pad attached somewhere. Some mop more intensely than others, but the bottom line is the same: They vacuum identically to their non-mopping counterparts, but also dispense water to wipe hard floors. For instance, when eyeing a mopping Roomba, you probably wouldn't choose the $300 to $450 (depending on a discount) on the iRobot Braava Jet m6 over the $400 to $600 (depending on a discount) Roomba Combo j6+. The Braava Jet m6 on its own won't vacuum, so you'd need to already have a robot vacuum, buy one, or do the vacuuming yourself before sending it out to mop. The Roomba, on the other hand, can do both, as well as empty itself and use small obstacle detection tech to avoid cords and pet waste. While the Combo j6+'s scrubbing may be slightly less meticulous than that of the Braava Jet m6, the discrepancy isn't enough to buy a standalone robotic mop.