I have relied on Clean Master to clear up the cache and remove residual files from my devices. Clean Master is essentially a junk file cleaner designed to increase the speed of Android devices. The app has many other tricks up its sleeve, such as built-in antivirus capability, memory booster and task killer.
The Clean Master app is also useful in identifying and filtering out apps that are no longer needed. It will give you a list of apps that are seldom used, along with the time and date they were last launched.
