I use greenify to close all apps in the background but still a lot of battery use in the background.
I use snapchat and messenger a bit but i use greenify to close them in the background.
I don't get through a whole day without charging.
Here is a picture of the battery use
https://goo.gl/photos/BfihxewMpVkB7doA6
Read more: I have a samsung galaxy s8 and i only get 3 hours screen on time max! The battery drains alot with screen off and i use greenify!