Robots are going to do many things for us in the future. They are already capable of cleaning your windows, so you don’t have to. The Mamibot W120 robot is compatible with iOS/Android devices. It has 3000Pa suction power and doesn’t make a whole lot noise either (<65dB).
The W120 runs on a 650mAh battery. It can clean inside and outside your window. It costs under $260 at this time.