Some Robot mops cost several hundred dollars, with others costing over $1,000, depending on its features. The best budget pick is the Yeedi Vac Station Self-Emptying Robot Vacuum & Mop, which costs $500, while our most pricey choice is the Narwal Freo Versatile Self Mop Clean Robot, which retails for over $1,000.  Like a robot vacuum, robot mops are a considerable investment, yet having a programmable cleaning device can help save you time. If you want to save money and already have a robot vacuum, consider buying a device solely a robot mop and not a vacuum-mop combo, such as the Bissell ReadyClean A3 Robot Mop.