I love it when this forum provides an accurate answer.  This stupid app was both driving me nuts AND was chewing up my battery.  The good morning / good night screens started after the latest update to my S5, and I had no idea what it was or how to kill it.  After seeing advice on the forum, I went into App Manager, disabled Peel, and answered "yes" when asked if I wanted to return to the factory default app.  Problem solved.  Now, to find a way to get Samsung / Google / whoever to stop including these asinine apps in their updates!!!