To add custom paint and drawing in Flutter apps, use the CustomPaint widget. It gives you a space to draw shapes and designs. In Flutter Mobile App Development, this helps make your app look special. Create a class that extends CustomPainter and write your drawing code inside the paint method using the Canvas and Paint tools. You can draw lines, circles, and rectangles. Don’t forget to add the shouldRepaint method to tell Flutter when to update the drawing. https://mobikul.com/flutter-app-development/