Siri, Please Unlock My Phone and Launch the App

Why?

It’s inconvenient to ask Siri to launch an app when the phone is locked. You’ll be immediately asked to unlock it with your passcode or fingerprint.

How?

Have a few rotating passcodes and say the right one when Siri asks for it to unlock and launch the app. Siri will recognize your voice and the passcode, and will always prompt you with the right hint as to what passcode you should use now.