The first two games are here: Poker - https://apps.apple.com/us/app/airplane-mode-poker/id67912479... https://play.google.com/store/apps/details?id=de.testco.airp... Liar's Dice https://play.google.com/store/apps/details?id=de.testco.airp... [iOS still in review]
BLE was the choice to have it work cross-platform and support multiple players. There is no Internet access and there is no analytics or app tracking.
It costs $2.99 as a one time unlock to host and $0 to join a game.
Thoughts on other games?