A free program for Android, by Adriaan de Jongh.

Secret Shuffle is a party game for four or more players who are all in the same room wearing headphones. It’s kind of like a silent disco, but with games!

The Secret Shuffle app is designed to work with Bluetooth and Wi-Fi connections. It synchronizes the music to up to 60 (!!) players so you can play one of 10 games together.

Secret Shuffle is a party game that requires a few simple rules to get started. The games are based on sound and movement. Each round starts with a song, and everyone has to listen to the song, but not at the same time. The rules are explained right before the round starts so even if some in your party are young humans or very old humans, you’re fairly certain they’ll figure it out.