Digital Force Bag App + Invisible Deck?

Hey everyone! I recently watched several videos where a magician asks two people to think of two numbers and add them up. Then, he pulls up a list on his phone's notes, and the total number reveals a playing card. After that, he brings out a deck, and that specific card is found face-up. Does anyone know the name of this routine?

I get that it could be a forced card, but I don't know all the specifics, and it also works with a list of animals.

Thanks so much for the help!!!! 💪🏻😁