CrossCalc is day to day Scientific Calculator that can be used on all your devices. It asks for no permissions and does not show any ads.

The User Interface is simple and intuitive with functions that are used in everyday life. It also provides many advanced functions provided by modern Scientific calculators.

It is available on popular App stores as shown below:

• MacOS
• iPhone/iPad
• Android
• Windows 10 UWP
• Linux - not available yet

The mouse, keyboard and touch pad can all be used to operate the Calculator.

The calculator can be used in two modes: Interactive mode and Direct expression input mode.

The interactive mode is same as any regular calculator that responds to pressing of buttons for calculations.

Alternatively, complex expressions can be composed with brackets, functions and operators, and evaluated.

The user interface automatically re-arranges the function pads according to space available on the screen, be it a mobile phone, tablet or desktop monitor.

The functions supported by the calculator are described in the following sections:

Basic arithmetic operators such as +, -, ×, ÷ and . are available as in any regular calculator.

Brackets can be inserted where necessary to clarify the precedence of expression evaluation. In the absense of brackets, expressions are evaluated according to the BODMAS rule.

Percentage function follows any regular calculator. It works in two modes:

1. Adding or subtracting a percentage of a number. For example, 150+10% gives 165 and 150-10% gives 135 as result.
2. Converting a fraction to percent. For example, 2÷5% gives 40 (percent).

For all other cases, using % function simply divides by 100.

The correction symbol (◅) removes the last entered symbol from the expression for correction.

If the expression is being directly entered, using the correction symbol removes the symbol just before the current cursor position.

The = symbol is used to produce the result of the expression. On the keyboard, either = or Enter key may be used.

Using ± symbol adds a minus at the beginning of the expression. If there is already a minus present, it removes it.

The ac pad is used to clear any expression and reset it to 0 to start calculations afresh. On the keyboard, Esc key may be pressed to clear all.

Pressing x² applies sqr() function to the current expression, multiplying it with itself.

Pressing √ applies sqrt() function to the current expression, to find the square root of it.

Pressing x³ applies cube() function to the current expression, multiplying it with itself twice.

Pressing ∛ applies cbrt() function to the current expression, to find the cube root of it.

Pressing 1/x applies inv() function to the current expression, to find the reciprocal of it.

Pressing x! applies fact() function to the current expression, to find the factorial of it.

Pressing ln applies loge() function to the current expression, to find the logarithm of it using base e.

Pressing log₁₀ applies log10() function to the current expression, to find the logarithm of it using base 10.

Pressing log₂ applies log2() function to the current expression, to find the logarithm of it using base 2.

Pressing e^x applies powe() function to the current expression, to find e (Euler's constant) raised to the power of it.

Pressing 10^x applies pow(10, x) function to the current expression, to find 10 raised to the power of it.

Pressing x^y applies pow(x, y) function to the current expression, to have it multiplied with itself y times.

Pressing |x| applies abs() function to the current expression, to remove the negativity, if present.

Pressing ⁿP_r applies npr(n, r) function to the current expression, to find the number of arrangements possible for n elements, taken r at a time.

Pressing ⁿC_r applies npr(n, r) function to the current expression, to find the number of selections possible for n elements, taken r at a time.

Pressing e applies function eul(), which returns the Euler's constant.

Pressing rnd applies function rnd(), which returns a random number less than 1.

Pressing mod appends the % (modulo) binary operator, which returns the remainder after the first number is divided by the second.

A keypad with keys 1 to 9 and A to F is provided to input hexadecimal numbers. Before keying in hex numbers, the prefix 0x is to be used. Press (0_x) on the function pad or the shortcut key x from keyboard to prefix 0x.

The function pad ▻₁₆ is used to convert the current expression to Hexadecimal notation. For this the function toHex() is used.

The function pad ▻₈ is used to convert the current expression to Octal notation. For this the function toOct() is used.

The function pad ▻₂ is used to convert the current expression to Binary notation. For this the function toBin() is used.

If the current expression is in Hex, Octal or Binary notation, pressing = converts it to Decimal notation.

and, or, not and xor are the four bitwise operators supported on the function pad. Of these, not is a unary operator which inverts the bits against 0xFFFFFFFF and applies the function not(). The others are binary operators.

Bit shift binary operators << (left) and >> (right) are used to shift bits of a given expression, a given number of times.

For the purpose of entry of numbers in other bases such as hexadecimal (16), octal (8) and binary (2), three prefixes are used, viz. 0x, 0o and 0b respectively.

For instance, 0xAA55 represents the decimal number 43605 in decimal and the same can be entered as 0o125125 in octal and 0b1010101001010101 in binary.

This is useful for converting between the bases and also applying bitwise operators on them.

The basic functions are evaluated using the functions sin(), cos(), tan(), cosec(), sec() and cot(). The input is assumed to be in degrees.

The functions sin^-1, cos^-1 and tan^-1 are inverses of sin(), cos() and tan() and are represented by asin(), acos() and atan() respectively.

The functions sinh(), cosh(), tanh(), asinh(), acosh() and atanh() represent the hyperbolic counterparts of the circular trigonometric equivalent.

The functions ▻deg and ▻rad convert from degrees to radians and vice versa respectively.

When the result is shown, the corresponding expression that was evaluated is also shown above it. It may be recalled for further modification and re-evaluation by tapping on it.

If you face any problems or issues, please create an issue here or write to admin@siara.in.

The Application icon was designed by (Double J Design, UK)[http://www.doublejdesign.co.uk].

This software was developed by Arundale Ramanathan (arun@siara.cc).