For teachers: class circles

A class circle is one you run as a teacher. Your students join with a code, and you can still get them back in when a key is lost.

• No student email addresses No registration, no password, no ads, no tracking – the data stays on a private server in Switzerland. The only credential is a recovery key.
• No lost accounts Lost the device? Mint a new key in one tap – the score, streak and items stay where they are.
• Everyone plays the same numbers You set the number stage for the class (20, 50, 100, 1000). A student’s own choice is kept and comes back when you hand the choice back.
• A shared leaderboard and a weekly goal Every Monday the Circle Challenge runs: 3 dailies per member per day, and every member wins the week’s reward item.
• Nothing happens quietly Every key you read is logged, and the student sees it – a note on their start screen, a line under Settings → Account.

In the app: Circles → New circle → “This is a class circle” → share the join code with your class.

Joining a class circle means trusting its owner with your account: a recovery key lets anyone play as that student. An ordinary circle never can.