My Calcul is your calculator and nobody else's: like most other calculator applications, it has a number of function buttons, which perform specific calculations on the number entered or calculated. But unlike in other applications, the buttons can be programmed by you to do exactly the calculations you want. You are free to set the name of each button, the calculation formula behind it, and its color. The calculation formula can take several named variables, and an unlimited number of parenthesis. 12 buttons on the screen is not enough? You can prepare as many different pages of 12 buttons as you want, so that you can have an unlimited number of calculations stored and available at any time. My Calcul also features an equation solver, where you open an equation xx named variables (up to 6), give a value to xx-1 variables and solve the equation on the xxth variable. You can store an unlimited number of equations to solve problems in all possible areas: finance, engineering, conversions...