I really liked this but the notification requirement on iOS killed it for me. I can’t remember the exact details but it is (roughly) not possible to suppress authorization request notifications because on iOS notifications are the only way to wake-up a backgrounded application. Net result is a notifications every single time krypt authorizes via your phone. This may not be a problem for many people but it drove me nuts. It is unbearable if you use auto-complete on the command line in eg SCP.

Edit: typos

Edit 2: related issue https://github.com/kryptco/krypton-ios/issues/75