Use APKPure App
Get Fast Reboot old version APK for Android
Quickly "reboot" your phone to free up memory! Does NOT require root!
TRY THE PRO VERSION (http://goo.gl/1Fe12), WHICH COMES WITH THE OPTION TO AUTOMATICALLY PERFORM FAST REBOOTS AND LETS YOU MANUALLY EXCLUDE APPS!
Simulates a reboot by closing/restarting all core and user processes and thus frees up memory. Your phone should be much snappier after using Fast Reboot.
DOES NOT ACTUALLY REBOOT YOUR PHONE, only the apps & processes. Does NOT require root. App icon by Arabi Ishaque