My phone makes a lot of noise when it's not in use. I think this is because apps running in the background have experienced an event, like Clash of the Clans. How can I change this? I'd really like to find out what apps just made my phone beep. I'm running Cyanogenmod 12.1 with android 5.1.1 (though soon to upgrade to android 6).
Lets take an example that its your clash of clans app(as u mentioned it in the question)...go in settings -> app -> select that app -> there will be a checkbox which says 'show notification'. Uncheck it