1 Button Voice Calculator 1BVC

No need to watch the screen, no need to select buttons.
Very simple use:

- For selecting the numbers:
Just touch the screen to select digits from 0 to 9.
Long touch to add a 0.
Shake the phone to record current number.

- For selecting operator:
Touch the screen to select operator.
Shake the phone to select current operator.

Long touch to record the result for further operations.
Shake repeatedly to reset values.