CB Calc - Custom Calculator

CB Calc (Custom Button Calculator) is a clean, fast four-function calculator — with one big difference: you can add your own buttons. Tired of repeating the same calculation? Build a button for it once, and it's there whenever you need it. Whether it's a quick conversion, a recurring formula, or a constant you use all the time, CB Calc lets you turn it into a single tap. WHAT YOU CAN BUILD - Constants — save a value or formula (like π×2) as a one-tap button - Transformations — apply a function to whatever's on the display, like sqrt(A) or A². Example: A×0.15 — calculate a 15% tip - Two-number formulas — create your own operators that work just like +, −, ×, ÷, but do exactly what you need. Example: (A+B)÷2 — an average of two numbers - Currency conversion — pick any two currencies and get a dedicated conversion button, with rates kept up to date - Math functions — sin, cos, tan, log,…