The roll call alarm
One alarm rings every phone in the group at the same time. Each person taps Acknowledge. Whoever is last, or doesn't answer before the cut-off, loses.
The Android app wakes a locked phone. The web app works on any phone from the browser, but only rings while it is open.
Five pounds goes into the group pot, collected by GoCardless under the Direct Debit Guarantee.
You are left out of the next one. Your organiser sets exactly what that means for your group.
Your organiser gives you an invite code. Enter it once.
The organiser sets the alarm times. Every member's phone rings together.
Tap Acknowledge. The server records the order. Last to answer loses, so does anyone who misses the cut-off.
Linking a Direct Debit is optional. Payments are collected under the Direct Debit Guarantee and you can cancel the mandate with your bank at any time. Penalties go into the group pot, which the organiser settles.