A free program for Android, by Wave Sound Studio.

You can write messages and draw on the sand in this fun and relaxing app. You can also make various kinds of drawings, including a simple one, with a lot of detail, and an even more detailed one, with a lot of different tools.

What kind of drawing tool do you want to use?

You can use a pen and a pencil, or a pen with a special tip, or a special pencil.

What kind of message will you be able to write?

You can write a message to the person who is with you, or you can write a message to someone else.