All-in-one transport app

Download the app "jakojade" for an all purpose transport app. You can use it in any city in Poland and it allows you to buy different transport tickets (single journey, day passes, weekend passes) and you can book intercity trains with it. You can top up funds with your credit card and the app can be set to English. Much more convenient than stumbling through ticket terminals or queuing at the clerk's window at train stations.