Define the app’s purpose and target users
List the core drawing features
Choose the platform and technology stack
Design the user interface layout
Create wireframes for key screens
Implement the drawing canvas
Add brush, pencil, and eraser tools
Add color picker and stroke size controls
Support undo and redo actions
Add layers if needed
Enable saving and loading drawings
Add export options such as PNG or JPG
Test touch, mouse, and stylus input
Optimize performance for smooth drawing
Fix bugs and refine the user experience
Publish the app to the app store or web platform