Check where is your bus or tram the best app that helps you to travel around the city.

Supported cities:

Edinburgh (UK) Malaga (ES) Lviv (UA) Rome Torino (IT)

Poland:
Cracovia Gdansk Lodz Poznan Wroclaw Warsaw Upper Silesia (Katowice Chorzow Gliwice Zabrze Bytom) and many others.