Hello Chalk is a free drawing app available on the Android platform, developed by Raysoft.co. The app is perfect for drawing lunch menus, to-do lists, funny sketches, and much more. It offers a realistic experience of drawing on a blackboard with chalks and board pens, accompanied by cool stroke sounds. The user interface is intuitive, making it easy to use for everyone. The app also features in-app purchases for additional functions.

One of the unique selling points of the app is the "Hello Drawing" series, which includes Hello Crayons, Hello Color Pencils, and Hello Chalk. The app requires permission to read and write external storage and full network access to share pictures on social media platforms such as Facebook. Google in-app billing services are also used to purchase sketches and full versions of the app.

Please note that the app requires Android JellyBean or a previous version to save the image to external storage. For Android KITKAT, the image files are copied to the Camera folder of the external storage. If you encounter the "Cannot Save To Camera Folder" message, please open the basic camera app of the device and take a photo. After that, you can save the image to the Camera folder successfully.