Calculate+4 -simple calculator

I made the concept that, want to use a calculator on a tablet and also want to use a calculator with a simple design.

The buttons are large and easy to touch, and have a simple design.
In calculator + 4 we put four calculators on one screen when we turned horizontally.

I think that it is useful in various places if you have to do simultaneous calculation.

[Major features]:

-Simple and easy design

-The button is large and easy to touch

-When turned horizontally, equipped with four calculators can be calculated simultaneously

-For portrait orientation, delete the rightmost value with backspace button

-Percent calculation also possible

-Supports both vertical and horizontal display

-Display comma (,) in every three digits for easy reading of calculation result

Supported Operators:

-Basic operations: +,-, x, ,%

-+/- conversion

If you have any comments or suggestions about this app, please contact us anytime,

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