Which app can I use for the mobile bahn card (train germany)? It looks like a qr code but isn’t a regular one (with the three squares). Their website has a button with which I can add it to google wallet. I have no google wallet. Is there a foss wallet?

I use catima for “loyalty cards” but it can’t read the bahn qr code and “fosswallet” is (strangely?) for apple wallet files.