the thing i use all the time is the maps app ( i havent updated my phone as the new version had a few problems) i used to have to use public transport with ds but even now with work etc i put in where i am going from where to and the time and gives me bus/train /ferry (in perth) route for a few times around my time - its great if going somewhere i am unsure of.
I now use it if i am driving somewhere new i put it in before i go that way if i get lost i pull over it finds where i am and i get new directions.
i also use the camera for other things than photos of ds - my main one - i take pictures of receipies so i dont have to write them out .
I didnt think i would use it much either but i love it as if you are out you can look up something you may need online etc
oh i also do bank transfers DH has access to 1 account as hes hopless with spending - he calls i transfer money via bank app and he can use it within minutes\.
You can turn notifications off i use fb on my phone but turned the notifications off