well in my case i got 4 apps ive had for a little while are Autokiller Memory Optimizer, Autorun Manager, Lagfix (fstrim) and Voltage Control now im not sure how effective they are, but of all of them VC helps me save some battery juice, AM lets me disable some apps at boot, AMO is not that noticeable but its supposed to help when multitasking its a minfree tweaker, Lagfix im not sure about this one have to research more on it, so thats it if anyone has used any of these and have some feedback about how useful they are or not let me know thanks