Built · v1.0.0
Phone Down
Phones down. First to pick up pays for coffee.
A coffee-table game. Everyone joins the same table and turns their phone face down. The clock starts once every phone is down, and the first person to pick theirs up buys the coffee, with a receipt to prove it.
- Platforms
- Android, iOS
- Version
- 1.0.0
- Built with
- Flutter, sensors_plus, bonsoir (mDNS), WebSockets, mobile_scanner
Try it
Phone Down needs each phone's motion sensor and other phones on the same Wi-Fi, so it only runs on phones.
What it does
- Host a table with a four-letter code and a QR code; friends on the same Wi-Fi see it straight away
- A wooden table seen from above, with each phone flipping as it goes face down
- A haptic count-in, live standings, and a receipt with a PAID stamp at the end
- Your record: longest time down, coffees won and rounds bought
How it’s built
- No backend: the host phone runs the rules and a WebSocket server, found over mDNS/Bonjour
- Face-down detection from the accelerometer with timing thresholds that ignore knocks
- The host's clock decides the times, so every phone agrees on who picked up first