1. Button function
: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).
TOOL
: Common used functions, such as common constant, hex converter, unit converter, currency converter and so on.
FUNC
: Click to open function list.
TEXT
:Click to insert words, for tally or taking notes usage (for paid user).
: Real voice, tapping sound, mute switch.
OPRT
:Click for saving calculation text or lookup text history.
2. Usage and note
- "x√y" means find the x-th root of y. For example: 3√27=3
- "x^y" means x to the power of y,such as: 2^3=8, 2^(-3)=0.125, (-2)^3=-8, (-2)^(-3)=-0.125
- "n!" means n factorial, n should be positive integer and no more than 170. For example: 5!=5×4×3×2×1=120
- "×" could be ignored between one more brackets and between value and brackets, such as: 3(1+2)(2+3)π(3+1). But can't be ignored between value and constant or function, such as: 3π,, 2sin(90) are both invalid.
- To input "0.25", you can only press “.25”. And it will prevent input like "0.24.34".
- Press copy button can "identify" the value on the cursor intelligently, even to negative number.
- Pressing copy button will also copy the text to system clipboard, for other applications. it can not support pasting the text from system clipboard.
- Put cursor on number, then press OPRT->Amount in words, will get the amount in words of that number.
- You can name functions or constants by unicode.
- Decimal digits can only be choosed in scientific notation mode.
- Press "=" button below last equation, will perform last plus/minus/power/divide operation.
- In main UI, you can press volume up or down key of your device to adjust volume to what you like.
- In constant and function list, the last positon where you have pressed will be remembered for the next use.
- It is recommended that testing your self-defined function before saving it.
- To export saved calculation history texts, it will create texts.xml file at /IdeaCalc-backup in SD card.
- To export self-defined constants or functions, it will create constants.xml and functions.xml file at /IdeaCalc-backup in SD card.
- You can edit constants.xml, functions.xml or texts.xml file on PC before import, to create your own constants, functions or calculation texts more easily.
- Excuting import will take data from constants.xml, functions.xml or texts.xml to software list. Existed items will be kept, and repeated item will not be import again.
- Excuting export will delete the old constants.xml, functions.xml or texts.xml file on SD card and creat a new one.
- In unit conversion or currency conversion, after you get the converted value, you can press the "ok" button to display result in main UI.
- As default, the software will be install to internal storage. If you like, you can move it to SD card by other tools.
- Some cyber friends feed back that after installing the new version, the icon will be disappeared. To solving it is very simple, uninstall and reinstall will fix.