Turn off launch agents and startup items to expedite the speed of the device. Check out login items and remove them if they are of no use. You can preview all the installed apps and extensions and be able to quickly remove the ones that are no longer needed. Thus, you are able to wipe out all the useless data that has cluttered the device or threatening to do so.
The quality that makes it exceptionally user-friendly is the ability to spot all the temporary files and leftovers of the apps you have already deleted. App Cleaner & Uninstaller is a fully-featured Mac cleaning tool.