Take your progress with you
Export your history, level streaks and settings here, then import the file at the new address. Progress stays on each browser; it does not sync automatically.
Import replaces the practice history and settings on this browser. Export your current progress first if you want to keep a copy.
Answer timerChoose ∞, 12s, 9s, 7s, 5s or 3s above the question. Each level remembers its own answer time. The clock starts after you press Start and finish the three-second ready countdown.
A little repetition helpsInfinite excludes the previous six questions. Sequential covers the set once in alphabetical order; Random covers it once in a shuffled order. Selecting a mode or level returns to setup. Press Start to begin.
Level streaksEach level has its own current streak and best streak. Switching levels or configuring a new session keeps them. A wrong answer or timeout resets only the current level’s streak.
Keyboard shortcuts1–4 answer · Enter next question · Space pause or resume
Reset progress
This clears answers, streaks and exploration on this device.