The Black Board app by PurpleCap Software is an Android-based chalkboard tool that provides an excellent platform for drawing, illustration, and math calculations. This simple chalkboard app comes with advanced options, including various colors and sizes of chalk. With this app, users can easily draw anything they want, whether it's a simple sketch or a complex equation.

Black Board provides a realistic experience for the user, allowing them to undo actions, erase everything at once, and replay what they have already drawn. Additionally, it provides three different styles of blackboard, including 4 line, 5 line, and math block. The app is free and is perfect for anyone who needs a chalkboard on the go.