Hello Ieraene!
I will start my first Camino on June 27 (
Camino Frances) in SJPP and have been "playing with" several apps in preparation. The one I like most so far is the
TrailSmart app. It has maps you can download and use off-line and your phone GPS will show you where you are.
It also has a compass feature that will supposedly point you back to the trail at the nearest location from where you are! It seems to have a good listing of albergues and places to eat with phone numbers and links to email or web pages, as well as good general information. We'll see how well it actually works on the Camino soon. I was having problems with one of the web links for one of the albergues I was looking into and sent an email to the maker of the app (they make that VERY easy) and I had an email reply from them within minutes. They noted the problem I was having and asked several questions to find the problem. (Turns out the "problem" was not as bad as I thought.) Very impressed with this app so far! (I think I had to pay a couple of dollars to download the off-line map portion of this app, but it seems well worth a couple of dollars to be able to use the map function off-line while walking.)
The other app I like is
Camino Frances Premium (I think I had to pay something like $1.99). It works in several different languages and seems to be pretty good.
Lots of people say to not worry about guidebooks or apps and just let the Camino show you the way and let it provide as you go. I can see a certain wisdom in that once you get on the Way and get a little experience, but it's good to know you have some good reference material for those times you need it, especially before starting when nerves are a little on edge. Hope my two cents-worth of insight helps!
Buen Camino!