1. Button function

: Insert words.

: Save calculate text.

: Lookup history.

: Convert number to capital.

: Statistics.

: Decimal to fraction and fraction to decimal.

: Share text.

:Collapse or expand fast buttons.

:Simple mode switch.

: Used for setting the decimal digits.

: Cursor to left.

: Cursor to right.

: Newline character.

: Clear all the text.

: Back to last edit.

:Redo last back.

: Copy the value on current cursor, current line or whole text. Long pressing will copy text from clipboard.

: Paste the copied value to current place.

: Backspace,long press to delete from cursor to start of the line.

sin
...
atan
: Fast input function.

π
: Circumference ratio π.

e
: Natural logarithm e.

E
:Scientific notation character,such as:2E-3=0.002。

!
:Factorial sign.

:One thousand percent sign.

(
)
: Left bracket and right bracket.

X
,
Y
,
Z
:Variables, used for recalculating the equation by different values.

XYZ
:Used for setting value of variable X,Y,Z.

Ans
: Last result, pressing will input last result.

()
: Brackets,for usage of complicated calculation with brackets.

: Power sign ^, means y-th power of x.

: Radical sign √, means y-th root of x.

%
:One hundred percent sign.

+
: Plus.

-
: Minus.

×
or
*
: Multiply.

÷
or
/
: Divide.

0
to
9
: Digital key.

.
: Decimal point.

=
: Begin to calculation. Press it on blank line below equation will redo last operation. Long press will display the process of calculation (for paid user).

HELP
: Usage help, etc.

FUNC
: Click to open function list.

CNST
: Constant.

: Real voice, tapping sound, mute switch.

TOOL
: Common used functions, such as common constant, hex converter, unit converter, currency converter and so on.

2. Usage and note