Live quiz games for your classroom or party, and cosy pixel rooms to actually get work done. Free, no sign-up, works on any phone.
Four doors
Everything runs in the browser. Nothing to install, nobody to sign up.
Games for a room.
Live quizzes over your own slides — buzzers, typed answers, multiple choice — plus icebreakers, polls and “which one are you?” personality quizzes you can make and share in minutes. Players join on their phones with a four-letter code.
Somewhere to study.
A pixel room with your pet, a shared pomodoro, and other people quietly working next to you. Body doubling for the internet. Pin things to the cork board, put on some sounds, and get through it.
Flashcards that stick.
Flashcards reimagined for neurodivergent students. Spaced repetition, a pet sanctuary, parent dashboard, and AI-powered deck creation.
Know where every student is.
A student tracker for tutors. Roster, progress and homework in one place. Local-first — your data stays on your device, and there is nothing to sign up for.
How it works
Host a quiz from your laptop, or open a study room in any tab. No download, no account.
A four-letter code for games, a room link for studying. Works on whatever phone they already have.
Buzz in, type answers, vote in polls — or start the shared timer and study next to people who are also studying.
Our mission
Features designed for disabilities end up benefiting everyone.
Curb cuts were built for wheelchairs — now everyone uses them. We build tools for neurodivergent learners that make learning better for all.