Polynomial Calc is an app that designed to calculate any polynomial equation. This app is use numerical method, so the calculation is needed looping time and have an error value, but it can be predict many from of polynomial equation with single variable x. This is also one of Smart Calc Lib that have been developed by Computational Lab. The main idea of this algorithm, we called as the progressive error prediction, where is the implementation of Genetic Algorithm. With that algorithm we can do