Doodle Rainbow is a fun and simple painting application available on iPhone. Developed by PICxPIC Inc., this free app is perfect for children who love to create colorful drawings.

With Doodle Rainbow, you can draw rainbow lines and use colorful stamps, all while enjoying funny sounds that accompany your creations. The app offers a cute and straightforward interface that is sure to captivate young users.

One of the standout features of Doodle Rainbow is the ability to save your artwork. Additionally, there is a trash button and an eraser button for easy undoing and correcting. You can also switch between two background colors, white and black, by tapping the trash button.

The app provides various drawing tools, including a rainbow pen, square stamp, circle stamp, star stamp, gradation stamp, and random stamp. You can also utilize the eraser, retry, and save functions to enhance your drawing experience.

Doodle Rainbow is also available as an iPad app, called "Doodle Rainbow for iPad." So, if you have an iPad, you can enjoy this delightful painting app on a larger screen.