I had never use this app before but based on description it functions too as task killer
I only use greenify pro n intelli3g app with xposed mod to solely control battery drain on standby. This combo works very well on all my Androids I had used to date

I do not use any other app to manage phone ram, memory etc as Google themselves do not recommend such stuffs. I do not even use Samsung default power saving features as the app combo I had mentioned is sufficiently good for me