OpenBeach

Fully offline beach volleyball e-scoresheet. Runs the scoretable and a
built-in LAN server so referee and livescore tablets and the court
displays connect over the same Wi-Fi — no internet, no accounts.

The laptop can create the tablets' Wi-Fi (a hotspot) or a Bluetooth
network itself. For that, connect the network-manager and bluez
interfaces once:

 sudo snap connect openbeach-escoresheet:network-manager

 sudo snap connect openbeach-escoresheet:bluez

Updates come from the Snap Store; the app's own updater is off in the snap.