x-callback-url is a way of applications on devices (iOS or Android)
calling each other and returning information.

It would be awesome if splashID supported x-callback-url features like
"add-record", "query-record (with pwd popup of course) and others.
This would be similar to 1-password.

There is an app called workflow.io that gives a graphical integration solution to integrating ios applications.

Keep up the great work, Cheers Dave