Geoffrey MillerVerified account

This is a good idea... Eventually smartphones will have some physical self defense feature.

Once your smartphone can 3D print a pocket nuke, yes.

phaser, it may not be for awhile, but it will come

Well it will be a permit for your personal assassin drone that follows you around and is deployed via smartphone. Permit will be stored in Apple Wallet.

If it has cryptography without a government sponsored backdoor...

For the app that controls your self-defense drone.

I'm still trying to figure out how an iPhone would replace this rubber.

Yes, once you can also use it like a taser.