Evaluation of complex math expressions:
- Multiple operations
- Parenthesis
- Variables
- Constants
- Functions (arithmetic, trigonometric, hyperbolic, ...)

Multiple numeral sets:
- Real numbers
- Complex numbers
- Residue classes modulo n

Calculations available in 4 numeral systems (including decimal numbers):
- Binary
- Octal
- Decimal
- Hexadecimal

Function derivative (differentiation):
- Higher-order derivatives
- Partial derivatives

Unit conversion:
- Length
- Speed
- Mass
- Volume
- Temperature
- And more...

Statistics:
- Sum
- Product
- Arithmetic mean
- Weighted mean (expected value)
- Dispersion
- Standard deviation
- Median

Combinatorics:
- Binomial coefficient
- Variations with repetition / without repetition
- Combinations with repetition / without repetition
- Permutations without repetition

Series calculations:
- Series summation
- Series product

Quadratic equations:
- Discriminant calculation
- Finding real or complex roots (in case of negative discriminant)

Rule of three:
- Direct proportion
- Indirect proportion
- Useful for percentage calculations and more

Fully customizable number format:
- Decimal separator (dot/comma)
- Thousand separator
- Number of decimal places
- Scientific notation

- Calculation history
- Multiple languages: English, German, Czech, Slovak

Have you ever spent hours performing complex calculations with an ordinary calculator a pen and paper, only to find out that you have made an error somewhere at the beginning and you have to start all over?

If so, your life is about to get so much easier. Kalkules - a popular desktop scientific calculator used by hundreds of thousands of users is now available for Android!