How do printable bingo cards work with phones?
Printed bingo cards work with phones through a game ID: every SnapBingoX card is printed with a Game ID, and entering that ID at snapbingox.com/track turns any phone into a live tracker for the whole printed game.
You keep the paper game exactly as it is — players hold real cards and dab them by hand. On the phone you mark the numbers as they are called, and every printed card in that game is checked against the called list automatically, with winners named by card number rather than by guesswork.
There are two levels of access. A player entering the Game ID sees the game read-only. A host who also enters the host key printed on the PDF cover sheet unlocks every card in the game at once, which is what makes checking a claimed win instant instead of a two-minute read-back.
No app install and no sign-up is involved; the tracker is a web page. For cards that were printed somewhere else and carry no Game ID, the mobile app can scan them with the camera instead.