Easy Calculator app for iPhone and iPad

This is yet another calculator that shows the all calculated process for you.
Have you ever worry if you pressed some +, -, x, / keys?
dont worry about that. Now you are able to calculate seeing previous inputs and operators.

Especially, it is so good to kid or people on store and billing.
And in addition to this, it provides memory view which memorizes to the slots of at most 7,
and as well, you can toggle the memory view.

features:
1. shows up all the calculated process.
2. view is scrollable.
3. memory view is supported so that you can pick up anything you want out of them.
4. sound supported to make sure to check if you pressed the key correctly.

And the buttons related to memory act slightly to existing calculators.
M+ is to add to memory view.
M- is to remove the selected value from memory view.
MR is to fetch the selected value out of memory view.