Astropad is a software application that allows users to turn their iPad into a graphics tablet for their Mac computer. It provides a seamless experience for artists and designers to create digital artwork using the Apple Pencil and other drawing tools on their iPad, while seeing the results in real-time on their Mac screen. Astropad offers features such as customizable shortcuts, pressure sensitivity, and palm rejection to enhance the drawing experience. It is a popular tool for professionals in the creative industry who require precision and flexibility in their digital artwork.