How to fix app issues in android

Apps are often at the root of a lot of issues with Android
phones. They cause performance problems, battery
problems and can eat away at your storage without you
knowing.
To check no apps are causing battery drain go to Settings >
Battery . Here you’ll see the apps and services that are using
your battery most. Unless you use an app or game an awful
lot, there shouldn’t be any in the top couple of spots.
To go about solving any errant app issues, go to Settings >
Apps , then find the one that’s either causing a battery
problem or appears to be misbehaving. In its entry you’ll see
buttons to clear its cache and data. This will effectively
reset the app. Try this, or uninstalling and reinstalling the
app.
You can also find out which of your apps are using the most
data
 by going to Settings > Storage and then selecting apps.
They’re listed by their size.

Source : trustedreviews