I landed at KTW and as the above post says, there were plenty of Matuszek buses just outside the terminal. However, as my hotel is ca 2 km from the terminus of the buses, I opted for the Uber option - it was 82 PLN (vs 20 for the bus) and the driver arrived within 5 mins of booking the trip. My other taxi app works, too (was MyTaxi, renamed to FreeNow - good one, too, works in a large number of European cities) for about the same price but indicated a 30 mins waiting time. There seems to be plenty of availability TO the airport, which is surprisingly far.
The regular taxis would charge about 140-160PLN.