RollCanvas is a drawing app between a picture and an animation.
With RollCanvas, you can draw on the canvas just like regular drawing apps.
The key feature of RollCanvas is that you have a cylindrical canvas rotating horizontally and you can draw on it while it's rotating.
By making drawings that are skillfully timed with the rotation of the canvas, it's like as if you're drawing an animation.
While typical apps allow you to draw on a still square canvas,
RollCanvas allows you to draw on a rotating cylindrical canvas.
By clicking "File Download", a RollCanvas file will be downloaded to your PC.
Using iTunes, You can transfer the file to RollCanvas and open it in RollCanvas.
Please refer to
Place Where RollCanvas File Is Saved
for more information.