SD Maid is an application with tons of features to help you remove all redundant files from your Android devices with a couple of taps. Do note that it works on rooted and with certain limitations on non-rooted devices too. The latest release, version 4.14.1 beta, is out on the Play Store and brings many UI improvements as well as bug fixes, especially if you are coming from the older v4.13.x series. Below is the official changelog, and next is the part with our own discoveries.