A reverse raffle app
With endless possibilities
RЯaffle is a reverse raffle app that can be used multiple ways as a fundraiser for any club or organization.
RЯaffle is a reverse raffle app that can be used multiple ways as a fundraiser for any club or organization.
Using ping pong balls as a way to randomly
pick numbers are a thing of the past.
Most computer raffle software is set to pull a number on a timed bases. With RЯaffle you can control when a number is pulled.
Not only can you control when a ticket is pulled, but you can also control when sponsors show up during your raffle.
Much like a news ticker, you can add announcements that will scroll across your screen to show important news or announcements.
RЯaffle is great for virtual raffles but even better for in person raffles. An internet connection is needed and works great with a wifi hotspot.
RЯaffle includes event ticketing so you can sell tickets to your event and scan their tickets at the door for easy ticket trackingand event entry.
RЯaffle can automatically pull tickets for you so you don't have to hangout at the computer.
NIST-aligned auditability
Raffle follows NIST's public-auditability approach: commit before the drawing, use a precisely defined deterministic selection process, then reveal enough evidence for an independent reviewer to reproduce the result.
Commit before the first pull
The ticket pool and secret seed commitment are fixed before activation, making later changes detectable.
Select without modulo bias
HMAC-SHA256 and rejection sampling give every remaining ticket an equal-size accepted range.
Retain the complete evidence
Excel and CSV exports include the locked pool, exact elimination order, prize winners, selection proofs, and a hash-chained event log.
Scope note: Raffle is not NIST certified, validated, or approved. Algorithm version 1.0 follows NIST's commit-then-randomness pattern but does not currently consume the NIST Randomness Beacon.
The right price for your need
With full backup of all your raffles and tickets in the cloud.