In just the last few years, the best robot mowers have improved significantly, and prices have fallen considerably. The size of your property will determine the type of robot lawn mower you need. The Best Robot Lawn MowersBest Overall:Best Value:Best Multi-Season Robot:Best for Large Yards:Most User-Friendly:Best Remote Control:How I Selected And TestedI’ve been testing robot mowers for over five years, putting nearly a dozen mowers across a variety of price points through a series of tests. It’s also really expensive, but it’s constructed of the same materials as riding mowers (and why it’s so heavy), so it’s more durable than most robot lawn mowers. How a Robot Lawn Mower WorksNavigation Robot mowers are constructed of a plastic body and chassis; some higher-end mowers use metal for durability.