I upgraded from a flip phone to a Nexus 5 last month. I've taken the less is more approach to loading apps on my phone. I've also tried to avoid installing apps from unknown vendors. I installed Avast Mobile Security to keep the phone secure and virus free. I installed the Kobo app so I can read books when I forget to bring a book or my Kobo eReader. I'm trying to lose some weight so I've installed several fitness apps - Couch-to-5K, DogWalk, FitBit, MapMyRun, MapMyHike, MapMyWalk and MyFitness Pal. I installed the mindfulness app because it has the best meditation timer that I could find on Google Play. I can't remember what other apps I've installed because I uninstalled them once I decided that I wouldn't use them.
I forgot to take my Lego keychain flashlight with me when I walked the dog last night. I was looking for a flashlight app this morning. I couldn't find a flashlight app that didn't collect data that I was willing to share with an unknown vendor. I'm planning to move all my house keys to Lego key chains. I may also hack the leash and use a wire tie to attach a fash light and a set of house keys.