Image sharing app Swapdoodle is available to download now in North America and Europe. Cost to you? Absolutely nothing.

The app allows you to sketch 3D pictures and share them with other 3DS owners. It even comes with special doodle lesson packs based on famous Nintendo franchises. These packs can be purchased in the app itself.

Here's some official info:

The Swapdoodle™ game is an easy way to write messages, draw 3D pictures, and share them with your Nintendo 3DS friends.

Swapping doodles is a snap thanks to stamps based on the icons of played titles and your Mii™ character. You can also purchase in-game add-ons packs that have doodle lessons of Nintendo characters!

Doodle lessons allow you to trace beloved Nintendo characters from the Super Mario™ series, The Legend of Zelda™, Splatoon™, and more! With the right add-on, you can also draw more doodles per note, boost your note storage to over 6000, get more than 45 pen colors, and download stationaries featuring Nintendo characters. Put a piece of yourself in your art by sticking on a Mii face with various emotions to choose from. It's also possible to share in-game screenshots with friends who also have the game and even create secret pages that are hidden until your friend replies. It's always fun to see what doodles your friends are swapping!

+ Swap messages and doodles with your Nintendo 3DS™ friends
+ Purchase add-ons packs to enhance your doodles and learn to doodle Nintendo characters
+ Take doodle lessons featuring characters from Splatoon™, The Legend of Zelda™, Super Mario ™, and more!
+ Draw 3D doodles on 2 layers
+ Place a sticker of your Mii character's face with different emotions
+ Send in-game screenshots from select titles

Let us know how you're getting on with this free download by posting a comment below.