The subject of how to deal with a SSD when you're disposing of the device it's been used in has come up numerous times, and the bottom line has always been that overwriting the data is deleterious to the drive and doesn't accomplish its intended purpose anyhow, and other than encrypting the drive from the get-go, the best approach is to do nothing, because of the difficulty involved in resurrecting the data after the SSD's data storage map has been erased.
I've now run across Data Shredder for iOS
which, its developer claims,
...surpasses international standards used by state and military organizations in secure deletion, making it the perfect choice if you're planning to sell or give away your iPhone, iPad, or iPod touch.
- Does the flash storage in an iOS device differ from the SSD in a computer in such a way that secure deletion is possible with the former, but not the latter?
- Under any circumstances, is the developer's claimedpossible?