I personally think smartphones are worth their weight in gold when on long trips. It sure makes it much easier to find all types of services and resources along the road, not to mention the ability to easily keep in touch via voice or text, get up-to-the-minute weather and weather radar and all kinds of useful things. I can do virtually anything with my smartphone that I can do with a PC or my Mac. It's my communication system, camera, weather radar, back up GPS, calendar, email, note taking, music player, TV/movie player, book reader, live video chat via Facetime or Skype, etc., etc., etc. I even keep user manuals for various pieces of equipment on it, i.e., Zumo GPS, Sena headset, etc. I consider my iPhone 6 a very important and necessary part of my travel equipment. I wouldn't think of leaving home without it, especially on a trip where I'm going to be thousands of miles from home.
One feature the iPhone has (and I have no idea if Android phones have something like it or not) is the "Find Friends" app. Anyone I give permission can literally track my whereabouts real time and see where I am on maps and satellite views.
One feature the iPhone has (and I have no idea if Android phones have something like it or not) is the "Find Friends" app. Anyone I give permission can literally track my whereabouts real time and see where I am on maps and satellite views.