OK old topic but one quick caveat with Clean Master and Battery Doctor (which the dealing with finally made me uninstall them and go with Greenify): you can put apps in the Ignore list, but sometimes you have to research to Ignore some system-type processes that can be Ignored that "feed" the apps. When I was using CM and BD, Waze would sometimes just die in the middle of a drive. Turned out that Waze dies if it doesn't see your phone having a working GPS in a timely manner. I had to figure out which "background" process to Ignore. And the interface makes that hard as it truncates longer names at a certain number of characters. I never did figure out what was causing my texts to be delayed by up to a half hour but that went away immediately after I uninstalled both (I tried several SMS apps and all had the same problem). I'm much happier with Greenify.