I don't know what is SD Maid. As you can read in features, this app will clean your device of useless system files, empty folders, etc. and it also clears your cache, file cache and other things (you can find it in feature), it is also good app manager (you can freeze, unfreeze, uninstall or clear data of your apps). This application cleans your device and it makes your device faster.
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Root Cleaner was updated! If you are satisfied with this app, don't forget to rate it positively, please.
http://bit.ly/WR7UvV