We have released a version of the ShredIt free space overwrite software for Android.
This version targets Android 4.0 and later so all of the latest Android phones, tablets, and TV sticks are compatible with ShredIt for Android. ShredIt for Android support the Mireth proprietary overwrite standard as well as the DoD and DoE government standards. You can configure ShredIt for Android to overwrite the free space on your Internal or External flash memory.
You can read more about ShredIt for Android here.
You can download ShredIt for Android here.
ShredIt is also available for Windows and Mac at Mireth Technology.