CallerBingo

One phone calls, everyone plays on their own card

Local multiplayer bingo for a room full of people. One person hosts and calls numbers from their phone, everyone else joins with a room code and marks their own unique card on their own screen. Bingo is detected automatically the moment a winning pattern completes, so nobody has to squint at a paper grid or argue about whether that really was a line. Works over the local network with no internet needed.