What are all the different apps you might need while traveling? When you think about it, there are many! If you go somewhere where they speak a different language, you might need a language translation app. You might need a packing list app. You might need one for hotel booking, car rental, flight bookings, currency conversion, and more! This traveling business can be complicated, so let us show you the list of the best travel apps for the iPhone to help make your entire trip a little smoother.