Does Krakow have UBER or LYFT or is it just taxis?
Taxi are soooo inexpensive. But the poblem is you can’t hail them on the street, you need to go to a taxi stand.
I agree about the cheap cost. The question was for a relative. One thing I noticed about the taxis: In 2014, every taxi driver we had in Krakow spoke great English and were Poles. In 2018, it seemed that the taxi drivers' English was really almost non-existent. One driver couldn't understand my American "Bus Station." When I wrote it down, he said "Ah, Boose!" It seems many of the taxi drivers now are from Ukraine and their English is not great. Maybe just my experience with about four drivers in May.
Taxis are also cheaper if prearranged, so it appears that your hotel or apartment renter might make the call for you for the cheapest rate. Like you said, I'm not going to go to a great effort to save $0.80.
We were in Poland in July and took taxis, they all spoke some English, my DH speaks a few Slavic languages and would have known if they were speaking Ukrainian.
I just Googled "Krakow Uber" and there is a result in Uber's website.
It might have been my terrible, stammering pronunciation, but I also found it a little difficult communicating with taxi drivers in Poland. But whenever it was necessary, I just wrote down what I couldn't manage to communicate and everything worked fine. My impression was that Poles, along with being friendly, welcoming people in general, are well aware that their language is a real tongue-twister for most visitors and are tolerant of our missteps.