Hibernation Apps?

[Sams6]

I recently got greenify to greenify one app, Skype, as I found it was a battery draining app that I didn't need notifications for unless I was using it anyway. I poked around a bit and I noticed greenify has a donation package with experimental system app hibernation and push notifications even when the app is hibernated, but I don't have money to donate to greenify for this. Is there any apps like greenify with these options? And is hibernating apps like this even helpful?

 

[anon(826501)]

Check out this app ( screenshot).