A free program for Android, by Romina Go.

This is a fun and easy-to-use coloring book app for adults and kids. It contains many pictures of characters from the anime series Hatsune Miku.

How to play:

Just choose a picture and click the corresponding coloring button to get started. You can choose from a selection of different colors and choose a brush to get more control over the coloring. You can use the color palette to get a general idea of what the color is, and you can zoom in on an area to get a more detailed view of the color.

The picture is automatically updated and you can save your progress and share your artwork with friends.