IGCalc for Windows Mobile stands out from the variety of existing calculators presence of the following options (for which he actually was written):

1. The phrase is introduced in full, as it is, and may be edited.
2. The result appears as you type.
3. Keep history imposed expressions.
4. It works with the clipboard (clipboard).
5. It supports hexadecimal, octal and binary numbers as you type, and output result.
6. It has a built-conversion core measures of length, weight, volume, temperature.
7. He has built a calculator IP-subnets.
8. Large buttons on the screen, you can easily click on the finger.

The changes and additions in version 1.5:
- Support for the horizontal orientation of the screen in all modes calculator;
- Support for Russian language (chosen through the settings);
- Bit operation "not" and "or" exclusive or ";
- IP-subnet calculator understands the job subnet mask as a number of bits of the network, and in the form of octets separated;
- Automatically detects the binary number in the IP-address and subnet mask;
- Added option "Copy results to the clipboard on exit;
- Fixed logic operations of calculating interest;
- Miscellaneous fixes and bug fixes.

The changes and additions in version 1.4:
- A new, more convenient to use without a stylus mode;
- Increase the size of the keys;
- Increase the font fields and the result;
- Support for soft keys WM5;
- Operation%, 1 / x, taking the expression in parentheses;
- IP-subnet calculator for network administrators;
- Miscellaneous fixes and bug fixes.

Calculating percent
As users stand in the hat examples of calculating interest.

The basic syntax is: x + y%
Instead of the "plus" can be any sign of arithmetic: + - * /
Means "to add x y% of x".
Calculated as: x * (1 + y/100)

In the case of simple calculations per cent should be put brackets: x * (y%)
Denotes a "y per cent of x"
Calculated as: x * y/100

If you write without brackets, you get quite another - "x times y per cent of x".

Examples:

By 200 plus 5% of the 200:
200 + 5% = 210

200 multiplied by 5% from 200:
200 * 5% = 2000

Calculate 5% of the 200:
200 (5%) = 10

http://www.ziddu.com/download/2504631/igcalc1.6.rar.html