How do coloring book apps work?

Coloring book apps work by providing users with a digital canvas and a set of virtual coloring tools. Users typically start by selecting a design from the app's library of images. They then choose colors from a digital palette and apply them to the design using touch controls or a stylus. Most apps offer various coloring tools, such as brushes, fill buckets, and blending options. Users can zoom in for detailed work, undo mistakes easily, and experiment with different color combinations. Once finished, colored designs can be saved to the device, shared on social media, or even printed. Many apps also include features like daily challenges, community sharing, and the ability to create custom color palettes.