iOS Passbook equivalent for Android When I would board planes on airlines like Delta and United during my time with an iPhone, I would load the boarding pass into the Passbook app (which became the Wallet app with iOS 9) and would not have to print out my boarding pass. Now I have an Android phone and a United flight tomorrow. How can I use a United boarding pass digitally on my Nexus 6P? Is there a Passbook-like app for Android or do most airlines support in-app digital boarding passes, so I can board the flight with just the United app and no printed pass maybe?

US domestic flight, if that matters. Android 6.0.1.
In the end, it was not necessary to use any other app; the United app itself allowed me to store the boarding pass digitally. And I assume it's the same for other airlines' Android apps (you just need to download them). Easy enough.