well from what i see spb mobile shell is the biggest memory hog followed by s2u2, expecially if you use gif animations and maybe also spb pocket plus but not so much, mainly these apps hog up memory because they are not like normal apps, these apps are always running which means that they cant be closed for the simple reason that it runs alongside your device so if they are memory hogs theres nothing you can do about it unless you uninstall