Gallery
Discover apps people built on Collabby by chatting. Run them, then remix to make them yours.
World Clock
See the current time and time difference between two cities, then find the best time to contact each other on the day bar.
Order of the Day
Read the sun's position and sky color to tell morning, day, evening, and night apart, then put the day in order.
Sleep and Health
Sleep hours shift one square at a time, showing how much sleep is just right and how sleep debt piles up.
Classroom Timer
Watch the circle shrink as the activity time counts down, and run several turns back to back.
Asynchronous Code
Set timer delays and see why code doesn't run in the order you wrote it, and why loops need a stop condition.
Speed
Change distance and time to work out speed, then race two objects side by side to see which is faster.
Elapsed Time
Move the hands of two analog clocks to see how start time plus elapsed time gives the end time, then test it in a quiz.
Gambit — Multiplayer Chess
♟️ Chess in the browser, in real time. Add a bot (easy, normal or hard) and start at once, or share the invite link and take a seat opposite a friend — the move list, check and promotion are all handled for you.
Shootout Duel
⚽ A live 1v1 penalty shootout, best of five kicks. One aims and charges the shot, the other reads the run-up and dives — then you swap roles at half time. Share the room link to duel a friend.
Pass the Bomb!
💣 A real-time party game for a room full of friends: pass the bomb on before it goes off, and hope it is not in your hands at zero. Share the invite link and everyone plays from their own phone.
Ladder Bomb — Multiplayer Party Game
A mobile-first real-time multiplayer Ladder Game web app for up to 16 players.
Host an RPS Tournament
A mobile-friendly, real-time multiplayer Rock-Paper-Scissors tournament!