How do I choose the weighting multipliers?
Use juniors as the ×1 baseline, then set seniors to ×1.5, the boss to ×2, and so on as relative values. Switch a group to fixed mode to set an exact amount like 'just this person pays 3000'.
What is the rounding unit?
It's the unit each person's amount is rounded to: ¥1, ¥10, ¥100 or ¥500. Rounding up to ¥100 makes collecting cash easier.
Can I send the result to someone?
Use 'Share / QR' to generate a short URL and QR code. Opening the link restores the total, headcount, group setup and rounding settings exactly.
Is the remainder roulette fair?
It picks the winner with the browser's cryptographic randomness (crypto.getRandomValues), so everyone has equal odds. Participant names are fully editable.