Is that really need the number pad to the calculator?
You know, the keyboard!

Really small!
Memo + Calculator!

Characteristic
Because there is no number pad, the window size is very small.
Auto calculate per line.
There are many functions.
The line which is not calculated can be used as memo.

Supported features
Plus, Minus/Negative, Multiplication, Division, Modulus, Exponent, Root, Parenthesis, Absolute, Factorial, Put off, Advance more up, Rounding off, Log e, Log 10, Sine, Tangent, Cosine, Pi, Natural Logarithm, The golden ratio, Bitwise,
Support multiple windows

For more information, enter ‘?’ in the app to see help message.