My older not so young lad used Uber in Rome a couple of years back. Highly recommended, he only had six or seven hours to kill between flights but thanks to the driver's help and advice he managed to take in quite a lot at minimal cost. I guess Uber where available and use ranks or mytaxi in other areas. Of course you will come across quite large towns in Italy with no taxi service whatsoever which is a bit of a culture shock for a lot of us... the locals just walk, cycle, drive or use buses.