The idea was to turn a phone (or TV) into a self-contained bingo host setup.

The host device runs the caller and board display, and players can join by scanning a QR code that opens a digital bingo card in their browser. Each card has a short ID so the host can quickly verify wins.

A few features it ended up with:

* TV mode so the board can be cast to a large screen * QR-based lobby that generates unlimited 75-ball or 90-ball cards * built-in voice callers that automatically announce numbers * quick win verification using a 5-character card ID * a few fun soundboard effects for when someone wins (or falsely claims bingo)

The caller itself runs fully offline, so it works well in cottages or community halls with weak internet. Players only need connectivity once to load their digital card.

It started as a small side project for hosting game nights but turned into a pretty polished bingo caller.

If anyone is curious about the implementation or has ideas for improvements, I’d love feedback.

Play Store: https://play.google.com/store/apps/details?id=com.bingosurf....