About Easy RDS
Random dot stereogram (RDS) can be made from a hand-written image on iPhone/iPod touch.
The random dot stereogram image can be save to Photo Albums, and be transmitted by appending it to mail.
At first, please check whether random dot stereo gram is seen in image below. This image is the one made from this software.

How to make random dot stereogram
Select the canvas for draw random dot stereogram.
In edit mode, you can add a canvas for draw new random dot stereogram.
Drawing image on the canvas. Width and the kind of the pen are chosen with a left button.
Making random dot stereogram.
The random dot stereogram image can be save to Photo Albums.
The random dot stereogram image can be transmitted by appending it to mail.
Notice
This software running on iPhone OS 3.0 or later.
Reference link
Random dot stereogram(Link to Wikipedia)
Autostereogram(Link to Wikipedia)