[jessaustin]

I didn't notice this issue addressed anywhere: what if the blue adversary/sex partner simply steals the red phone for a few minutes in order to grant access to the blue phone? Will red be informed of this? Is there some sort of passphrase that only red knows, to prevent this?

[nathankot]

Yup, you can set an in-app passcode that locks the UI (you're asked to set one different from the phones passcode)