Coloring Book Engine is a production-ready, fully customizable framework for building professional coloring and painting apps in Unity. It includes a smooth drawing system, configurable brush and eraser tools, sticker placement, smart zoom and pan, and a reliable undo/redo history. Input is tailored for both touch and mouse, providing a responsive experience across platforms. All configuration is handled through ScriptableObject assets, allowing you to modify brushes, stickers, palettes, and settings without touching code. The architecture is clean, modular, and easy to extend, suitable for kids’ coloring books, casual creative apps, or more advanced art experiences. High-quality PNG export is built in, with automatic handling of mobile permissions and file paths. Coloring Book Engine provides a solid foundation to build, reskin, and ship your coloring app quickly—without rewriting core systems. Try the game HERE: Android: Link here: