[Swordmaker]

Someone will sell you an app that double-encrypts your phone. Get in with the Apple key, and the FBI will still have to get past a PGP-equivalent that is beyond the capabilities of even the NSA.

The iPhone 5s and above already encrypts the data to a 256bit AES standard. . . and it's the best encryption there is available. There is no need for double data encryption on an iPhone. Such double encryption is not worth doing. . . It's a waste of resources.

PGP-equivalent is what you need for Android phones.

The only reason you'd want a PGP app on an iPhone is to encrypt and decrypt mail.

[Pollster1]

The iPhone 5s and above already encrypts the data to a 256bit AES standard. . . and it's the best encryption there is available. There is no need for double data encryption on an iPhone. Such double encryption is not worth doing. . . It's a waste of resources.

I don't quite agree. If the Feds have your key from Apple, then double encryption accomplishes something. That puts them back in the original situation, which they cry about. Even if NSA can crack it, the FBI has to call NSA (or Israel) to read it instead of just using their magic key.