Secure Data Destruction for Android is a tool to destroy files so they can not be recovered.
It will overwrites the actual content of those files, so a file recovery app may be able to restore these files but the content will be destroyed.
There are 2 tabs:
1. Wipe files: the selected files are overwritten with blank data before deletion. The files can also be truncated and renamed.
2. Wipe free space: the free space on the internal memory/external microsd/usb key is filled with temporary files until the memory is full. At the end of the operation, these temp files are deleted
Link on Google Play: https://play.google.com/store/apps/deta ... estruction