To buy: $140 (was $230); amazon.com. Not only does the robot vacuum efficiently clean floors, but it also has smart navigation sensors that prevent it from falling down stairs or going ledges. It even has rubber edges to protect your walls and furniture from scratches as it works. It’s about 3.5 inches tall, so it can fit underneath most furniture pieces like couches, coffee tables, and accent furniture to clean all the spots you might otherwise miss. You can control the vacuum through the Shark mobile app or through voice control when connected to smart speakers. And it runs for up to 120 minutes before automatically returning to its charging dock.