Whiteboard is a free productivity app developed by Salamander for Android devices. As the name suggests, it is a digital whiteboard that allows users to take notes, draw diagrams, and save their work on the screen. The app is designed to be used in full-screen mode and has an easy-to-use interface.

With Whiteboard, users can save their notes on the screenshot of the hardware features of their Android device, eliminating the need for a separate save button. The app also allows users to erase individual lines by rewinding them one by one using the back button. For quick erasing, users can press and hold the back button to erase all lines at once.

Overall, Whiteboard is a simple and useful app for those who need to take quick notes or draw diagrams on their Android device. It is free to use and does not require any additional permissions.