Some robot vacuums function as both vacuums and mops, with an interchangeable mop cloth. The idea with these is that you can run the mop cycle once the vacuuming has finished, to make your floors squeaky clean. In my experience these don’t tend to perform as well as dedicated models — both in the case of robot vacuums and robot mops. However, there are always exceptions. Be sure to check out our best robot mops page for guidance.