When we switched to *MAT* 0.8.0 in Tails 4.0, *MAT* lost its graphical interface and was only accessible from the contextual menu of the *Files* browser. It became especially hard for new users of Tails to learn how to clean their files. *Metadata Cleaner* fixes this by providing a simple and easily discoverable graphic interface to remove metadata.
*Metadata Cleaner* works on the same file formats and is as secure as *MAT* because *Metadata Cleaner* also uses *MAT* in the background to do the actual cleaning.