clear application cache

8 Steps to Keep Your Phone Running Like New
many people don't like the idea of constantly upgrading their phones to newer models every 2 years, so they've taken a proactive approach to keeping their phones running like new even when they're a few years old.
How to clear cache and delete different Android application data?
cache is a temporary storage of certain data files on a device. the purpose of cache is to speed up, make the device more 'smooth' and to reduce the amount of data being processed. when clearing cache data of a certain application, it means deleting temporary files in the cache.