The app will show the
DAS return time on the home screen and once the time has arrived, there will be a button that says "Redeem". When you click on that, it launches the barcodes for everyone with a photo of the ride underneath. The DAS holders barcode will say (Registered) under the name. You have to swipe to the DAS holder's barcode first, yes. At
Disneyland, you insert your phone into a slot, barcode at the top. The phone only goes in halfway. Once you have scanned in the DAS holder, you leave the phone inserted and simply swipe through the rest of the barcodes. I prefer to use these specific DAS ride barcodes to the ticket barcodes in the app. They read easier in the machines.
You can also use physical tickets, but that gets cumbersome.
The easiest way is to load everyone's tickets on everyone's phones OR just have anyone with a phone just log into the app with your credentials (that's what we do in my family). This way, everyone's app shows the same stuff.