Activity

Badges

Four tiers, from bronze to the legendary Invariant tier. Locked badges show how close you are.

Themes

Unlocked by level. Your choice re-colours the whole site in dark mode (the moon button at the top).

Leaderboard

How experience works

Practising on any day keeps your streak alive. Every 7 days of streak earns a freeze (you can hold two), which covers a missed day automatically. Experience is banked day by day, so it never goes down.