I recommend this apps not for criticizing other power saver apps that consume enough memory or RAM. This apps eat only little ram rather than other power saver apps. I love this apps so much, for me this is the best rooted apps. I will teach you how to use it. Just follow carefully. Don't worry this is safe and tested by many people around the android world. lol
Requirements
Rooted
Geenify+Xposed.rar(extract first)
1. Dowload and Install Greenify
2. Download and Install Xposed Installer
3. Go to Xposed Installer then Framework
Disclaimer: This tutorial I've mentioned is greenify 2.1 version with donation package. I'm not sure if this final version will work on your phone.
select Install/Update wait to complete then Soft Reboot.
5. Go to Greenify then click (+) sign to add the install apps you want to "HYBERNATE"
6. In Greenify click settings at right lower then "Create Hyberantion Shorcut" this will add to your shortcut that appear in your homescreen.
7. In Greenify Settings click Experimental Features then "Check Boost mode" and "Greenifying System apps"
8. Now click the (+) sign the "show more apps" to check all the apps you want to hibernate.
NOTE: hybernating system apps can crash your phone. So select only safe to hybernate like calendar,calculator,clock etc.
Enjoy!
Disclaimer: This tutorial I've mentioned is greenify 2.1 version with donation package. I'm not sure if this final version will work on your phone.
If you want to try final version here's the link: Greenify.2.4.4.Final.apk