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A robot snow blower costs more than a walk-behind because it is a battery vehicle, a navigation system and a snow thrower in one. Here is where the money goes and how to judge value.

A remote control snow plow pushes snow while you steer it. A robot snow blower lifts and throws snow on its own schedule. Here is how they compare on depth, slopes and effort.

Yarbo's robot takes in snow up to 12 inches high, throws it 6 to 40 feet and clears up to 7,000 square feet per charge in light snow. Here is how depth and wetness change those numbers.

The most useful gift for someone who owns a home is one chore they never have to do again. Here are ideas by chore, from windows and floors to pools, leaves and snow, and how to choose one that fits.

A vacuum mop robot picks up dust and then wipes the floor in the same pass. Here is how the combination works, what to look for, and how the HOBOT LEGEE-688 approaches it.

Both hold to the glass, mist it with ultrasonic spray and wipe automatically. The HOBOT-2S adds a second nozzle, sensors that find the edge of frameless glass, better corner coverage and an app.

Yes. A window cleaning robot holds to the glass by suction, wipes in a planned pattern and saves the ladder work. Here is what it does well, where it leaves a little for you, and how the safety systems work.

Most robot mowers survive rain, and some detect it. Cutting soaked grass is a different question: it clumps, tears and ruts soft ground. Here is what the makers list and how to handle wet weeks.

Mower slope ratings come in percent and in degrees, and the two are not the same. Here is how to measure your slope in ten minutes, convert between the scales and read a rating correctly.