How Groups Work
Create a private group and invite friends using a shareable code. The group creator is the admin and can manage members, update group details, or disband the group. You can only be in one group at a time.
How Our Draw System Works
Commit Phase (Before Draw)
A cryptographic commitment hash is generated and stored before the draw. This prevents any manipulation after participants enter.
Randomness Source (drand)
We use drand, a distributed randomness beacon operated by a global network of independent organizations, ensuring no single party can predict or influence the outcome.
Winner Selection (HKDF-SHA256)
The drand randomness is combined with our commitment using HKDF-SHA256 key derivation to generate provably fair winner selections. Each participant has an equal, verifiable chance of winning.
Verification
All draw sessions are logged with timestamps, participant counts, and cryptographic proofs. Anyone can verify the integrity of past draws.
Your Group
Join a Group
All groups are private. Ask the group creator for an invite code to join.