Welcome to use IdeaCalc!

1. Insert remaks in equation

You can insert words freely in equation, and it would not affect the calculation.

2. Save and look up calculation history

To save calculation text, press disk icon in text area. To lookup history, press lookup icon. Paid user can save more than 2 text history and more than 20 calculation history.

3. Zoom text by fingers

With two fingers touch, you can zoom the text size to what you like.

4. Lookup history by gesture

To lookup history, just put your fingertip on the text area and slide on it.

5. Double tap to full screen

Textbox too small? Ok, double tap it to get into full screen.

6. Drag to switch fast input

Drag fast input row left or right, see any thing different?

7. Big button mode

Button too small? Functions not used at all? Press this button, you will find something changed.

8. Display calculation process(only for paid user)

Want to see calculation process? It is easy, just long pressing "=" button.

It is convenient for teachers and parents to check homework, but better not let kids use it.

9. Multiple kinds of button feedback

You can choose voice or button click sound to get aural feedback, or choose button vibration to obtain haptical feedback. When you release button, you can even get the visual feedback by button fading out effect.

10. Read out result

Pressing "=" can read out the result, such as: 123 will be read as: one hundred and twenty three.

11. Landscape and portrait

Landscape and portrait, Which you like more? Of course, landscape is more fit for long expressions.

12. Long expression and multiple brackets

The program supports long expression and multiple brackets calculation. There is no limit to the length of expression and the deepth of brackets.

13. Continuous calculation

Want continuous calculation? Very easy, follow the equation below:

Just press +:

Is that easy?

14. Redo last line operation

Easy to count up or count down, pressing "=" will do that just below last equation.

15. Operator substitution and preventing repeat input

Press +, will display as -+? Just try and you will know.

And press + again and again, guess what will happen?

16. Variable calculation

Want to write a equation, to fill in different values to recalculate? All right, write down the equation, put in different value, and press "=".

17. Abundant of constants and functions

Maybe the most abundant of constants and functions are provided.

You can even define your own canstants and functions as blow.

18. Constant symbol substitution

With constant symbols embedded in expression, the equation will be more concise. Just try the expression: π+exp, to see what will you get.

19. Function expression in the text

Function expression can be add in the equation by pressing the button "FUNC" to choosing what you like. You can even write functions by unicode.

20. Unique undo and redo function

Miss functions undo and redo in WORD? Here, both buttons are prepared for easier operation.

21. Cursor anywhere

Even cursor is not at the end of a line, you can still get the result just by touching on the button "=".

22. Recalculate on old equation

Want modify on the old equation to recalculate? Yes, it is very easy. Just modify the old equation and press "=", the result will override the old one.

23. Amount in words

Put cursor on value and press "Amount in words" button, you will get what you want.

24. Total and statistics

It will automatically import all results to do statistics(only for paid user).

25. Decimal to fraction

It can convert decimal to fraction, and also support circulating decimal to fraction conversion(for paid user).

26. Decimal to fraction

It can convert fraction to decimal, and also support fraction to circulating decimal conversion(for paid user).

27. Input decimal point intelligently

To input "0.25", you can just input ".25". And it will prevent wrong input like "0.2.5".

28. Export to or import from SD card

With import and export function, no need to worry lost data any more.To paid user, it will save data to directory of sd card: /IdeaCalc-backup automatically when app exit.

29. Hexadecimal conversion

The UI is so simple that you will know how to use it by only glancing at it.

30. Hexadecimal conversion with decimal(only for paid user).

With high precision hexadecimal conversion with decimal, it can meet more professional requirements.

31. Unit convert content display

The symbols which is participated in unit conversion will be displayed in the text area, which is easier for you to lookup.

32. Abundant of unit conversion

Types of unit including: distance, area, volume, weight, strength, force, speed, time, pressure, power, energy, temperature, angle, degrees, density, illuminance, data size.

We would like to provide every category we knows in unit conversion. You can see that just in category of distance, there were 38 units.

33. Abundant of currency conversion

Support 100 more Unions, countries and areas, and support real-time currency conversion.

34. Various theme(only for paid user)

By various themes, you will always choose out whichever you prefer.


Stay toned for more creative experience!