Though it wasn’t first to the robo-vacuum game, iRobot’s Roombas have always been the most dominant force in it. By way of simple app control, powerful suction and smart floor mapping tech, it’s remained the standard bearer for the robo-vacuum market since its debut in 2002. During Prime Day a trio of its past-generation vacuums are heavily discounted. All three are supported by iRobot’s smartphone app, which acts as both the controller and troubleshooter. The price gulf between the three can be attributed mostly to suction power, with the 690 (the cheapest) sporting the least suction and the 980 (the priciest) packing the most. Each is discounted 33 to 39 percent during Prime Day.
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