Android: Free app SHREDroid really is like a shredder for Android phones. It doesn't perform a "secure delete" on a particular file or folder, but instead securely wipes the supposedly vacant spaces where deleted files used to be listed. If you're wondering why that means anything, it's because deleted files aren't really gone the moment you delete them—they're just not listed anymore. Something needs to be written over the data for it to really be gone, and that's what SHREDroid does with one tap of the finger. More »