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The best calculator apk for Android device! - Multiple workspaces with their own history and variables. - History and variables are automatically saved and restored. - Evaluates math expressions including grouping. - Supports trigonometry and another functions. - Converts troops of distance, speed, temperature, time, volume, and mass. Make multiple workspaces with their own history and variables that are saved when the application exits. Enter easy or complex mathematical expressions and immediately calculate the effect. From adding your grocery bill to calculating cosine to doing your taxes, Calculate X does it all. Use the unique variable `reply` to refer to the most latest effect. Tap a previous entry to copy it to the input field. Results are automatically added to a history record, so you don't have to write them down to remember them. Those results are even saved and restored when you exit and reset the application. There is also a Windows ver on the Microsoft Store. Basic Mathematical Operators Calculate X supports the primary mathematical operators: addition, subtraction, multiplication, division, modulo, and exponent. You can use parentheses to group expressions and give them precedence. addition: + subtraction: - multiplication: * division: / modulo: % exponent: ^ Example: (3 + 4)*(5 - 2) * (sin(68) / sqrt(25)) + max(16, 7) ^ 2 You can also use algebraic (implied) multiplication in a lot of cases: Between groups: (3 + 4)(5 - 2) Before and after groups: -17(9 / 3)42 Before and after functions: 23sqrt(9)ceiling(25 / 2)12 Between groups and functions: (4 + 3)sqrt(9)(12 / 2) Between groups and variables: (4 + 3)e(12 / 2) Before variables: 4pi Variables You can make variables and access them in your expressions. Variables can include letters, digits, and underscores, but they must begin with a letter. All variables and their current values are displayed in the list on the right. Examples: x = 23.68 y2 = sqrt(146) x2y = x * y2 result = 12 + 8.4 subtotal3 = effect - x2y + 87 The 'pi' and 'e' variables are pre-defined. The 'reply' variable always equals the most latest result. Examples: y = sin(pi / 2) y2 = asin(2pi) x = y + 2 x + 1 (The effect is 4 and the reply variable is automatically set to 4.) You can clear a variable (and remove it from the variables list) by setting it to nothing. x = Primary Functions sqrt(n) - square root of n cbrt(n) - cube root of n abs(n) - absolute value of n pow(n, x) - n to the power of x min(a, b) - smallest of a and b max(a, b) - biggest of a and b round(d, n) - d rounded to n decimal places truncate(d) - d without decimal portion floor(n) - biggest integer smaller than n ceiling(n) - smallest integer larger than n random1() - random number r less than 1 (0 <= r < 1) randomN(n) - random number r between 0 and n (0 <= r < n) Trigonometric Functions cos(t) - cosine of t cosh(t) - hyperbolic cosine of t acos(t) - arccosine of t sin(t) - sine of t sinh(t) - hyperbolic sine of t asin(t) - arcsine of t tan(t) - tangent of t tanh(t) - hyperbolic tangent of t atan(t) - arctangent of t atanh(t) - hyperbolic arctangent of t atan2(x,y) - arctangent of x/y Logarithmic Functions exp(x) - e to the power of x log(n) - log base e of n log10(n) - log base 10 of n log2(n) - log base 2 of n Conversion Functions To convert between two troops, use this format: n[from->to] Example: 80[kph->mph] length Kilometer km Meter m Centimeter cm Millimeter mm Mile mile Yard yd Feet ft Inch in speed Kilometers/hour kph Meters/second m/s Miles/hour mph Feet/second ft/s Knot knot (nautical-miles/hour) Mach mach (speed of sound) temperature Fahrenheit f Celsius c Kelvin k time Week wk Day d Hour hr Minute min Second sec Millisecond ms mass Kilogram kg Gram g Milligram mg Ton ton Pound lb Ounce oz volume Kiloliter kl Liter l Milliliter ml Gallon gal Quart qt Pint pt Cup cup Ounce oz