Ones I have on my Android
Parkopedia - useful if you are in a town or village you don't know and want to park.
Refill - if you want to have a glass of water or to refill your bottles for free.
FM Radio - I tend to listen to Radio 4 mostly.
Zello - a walkie-talkie to the world. Great for listening in to USA 'rednecks' who are so angry with the world, love their guns, love Mr Trump and are full of conspiracy theories. Great entertainment, very worrying sometimes as well. You can join in with the conversations if you want. You can even create your own free channel, mine is 'UK BACKPACKING.'
RealTime GPS tracker - it works very well.
Google News - I can pick up newspaper news easily.
Kindle - I download books, mostly the classics, they're free. A few paid-for ones as well.
MobileVoip - So I can make my phone calls through the internet.
Windy Maps - a simple easily seen and followed route guide. I use it when I'm in built-up areas, far better than OS maps.
Wikiloc - To find hiking routes when I'm in a place I don't know. It worked fantastically on Gran Canaria and La Palma for me.
National Rail - I use it when I finish my hike and need to get home.
UK Bus Checker - very useful when no trains are nearby. I then use my Bus Pass.
IGN Espace Collaborative - My go-to hiking map when I'm in France. All of the Grande Rondonnee routes are displayed beautifully.
And of course Skype, Whats App, Backcountry Navigator, Last Pass and my banking app.
Looking at my list, it could be judged as overkill?