FAQ & Knowledge Base

Retiroll is a free, web-based random picker with 9 physics-based engines — spin wheel, lottery blower, dice roller, Plinko, slot machine, dartboard, card draw, bottle spinner, and tournament bracket. Great for classrooms, events, team standups, or just settling who picks dinner.

Yep — 100% free. Every engine, every feature, no paywalls, no "premium tier" upsells. Just open it and go.

Nope. No sign-ups, no emails. Jump straight into the Free Sandbox or Host Studio, add your names, and spin. Everything saves right in your browser. 💡 Did you know? Your saved game sets stick around even after you close the tab — they live in your browser’s local storage, so they’ll be right there next time you open Retiroll on the same device.

Anywhere from 2 to 10,000+. The rendering engine scales dynamically, so animations stay smooth whether you’re picking from a class of 15 or a raffle of 5,000.

Yes. We use cryptographic-grade randomness combined with real physics simulation (angular momentum, friction, bounce). Equal-weight items get exactly equal odds — no rigging, ever.

You assign a weight to each entry. If Item A is weighted 2 and Item B is weighted 1, A gets double the sector space (or double the lottery balls), giving it an exact 2:1 chance. The math is transparent.

Once someone is picked, they’re removed from the pool. Everyone gets a turn — no repeats.

No. Physics runs live in your browser — the result is determined in real time by the simulation trajectory. No one knows the outcome until it lands. Suspense guaranteed.

Absolutely. Retiroll is COPPA-compliant — we collect zero student data. No emails, no names on our servers. Any roster you type or import stays entirely in your browser’s memory. 💡 Heads up for teachers: Since nothing leaves your device, there’s nothing for your district IT team to worry about either.

In Host Studio, hit "Import CSV / Spreadsheet". Upload a .csv from Google Sheets or Excel, or just copy-paste your name column directly into the roster area. Done in seconds.

Yes — touch-optimized for interactive whiteboards and Promethean boards. Tap to spin, confetti fills the screen, and the high-contrast palettes are visible from the back of any classroom.

Some popular setups: Tournament Bracket for team trivia, Card Draw for flashcard drills, and the Reward Wheel for PBIS celebrations.

Fully responsive — works on iPhones, iPads, Android, Chromebooks, Mac, and Windows. Touch gestures are built in.

Yes! Retiroll is a Progressive Web App (PWA). Once loaded, everything — physics, audio, rendering — runs locally on your device. No internet needed after the first load. 💡 Good to know: This makes it perfect for venues with unreliable Wi-Fi, like school gyms or outdoor events.

Not at all. Every click, tick, and fanfare is generated in real time using the browser’s Web Audio API — no audio files are downloaded or streamed.

In your browser’s local storage (HTML5). Close the tab, come back later on the same browser, and your game sets will be right where you left them.

When you host a live session, Retiroll generates a temporary PIN (e.g., 842-195). Participants visit retiroll.online/join, enter the PIN on their phones, and see the game live on their screens.

Yes — there’s a Suspense Duration slider in both Host Studio and Free Sandbox. Set it from a quick 2-second snap to a dramatic 10-second nail-biter.

Sure. Export as JSON or CSV from Host Studio, then email it to a colleague. They import it in one click — instant setup.

Hit us up on the Contact page or email [email protected]. We genuinely read every message.