Shrub is Linked by Air’s drawing app for iOS. The world around you is your medium.
In this way, Shrub is a tool for painting-and-traveling, and even for painting while moving your own body (for example to use the color of your own pants).
If you touch with two fingers, you can immediately send your drawing as an SMS message. Shrub is designed as a mobile communication tool as much as a mobile drawing tool.
More pro tips: For the best drawings, pinch with your fingers to change the brush size. Twist with your fingers to change the brush softness. And of course, tap with one finger to show and hide the viewfinder.