Rolf Borst

This app is a function plotter for your phone. You can easily enter a function with a special keyboard and then the app will plot the graph and show y …

Do you also want to know, how much money your money box or piggy bank actually contains? This small app helps you to carry always the correct answer w …

I love to play games and a wonderful game is chess. With this application you always carry a chess clock with you.This chess clock supports different …

Your next holiday begins in sixty days and you have more than one hundred days to buy the birthday gift for Anna. You are not sure? Use this small app …