Secret Sketch app for iPhone and iPad

This application is a place which the public notice worries, and it can sketch it secretly.

The transparency of canvas can be changed.
If transparency is sketched in the state where it was made high, it becomes difficult to be visible from a surrounding person about what is drawn.

A change of transparency can be made with a lower left button.
If a button is pushed, it will become the canvas of actual transparency (opaque).
Drawing with a button pushed is also possible.

Functional list
- Change of the transparency of canvas
- Change of Pen color
- Change of Pen thickness
- The change of a pen tool and an eraser tool
- undo / redo (only 1 time each)
- A setup of the transparency of canvas