App in the Air: Flights Hotels
I used to love V for Wiki but it's unfortunately now retired, so I suggest the Wikipedia app tp see historical places and understand the history background of the places you're visiting.
Today we it's very common to depend a lot on an internet connection. Requesting Uber rides, looking at maps, looking for public transportation and itineraries and so on. In order to have a reliable cellular connection I usually use the e-SIM from T-Mobile or Gigsky