How to Practice
You do not need a fast score to have a useful session. Start with a pace you can repeat comfortably and use the timing trace to see whether the gaps are even.
1. Set up a short baseline
Choose Speed test, 10 seconds and Keyboard. Rest two fingers on Z and X, or enter two different letter or number keys. Select Start session. Nothing is timed until your first accepted tap.
Tap left, right, left, right. Release each key between taps; holding a key does not add points. Only the two configured keys count. Stop and take a break if the movement becomes uncomfortable.
2. Read both pace numbers
Stream BPM describes your average tap-to-tap spacing. The result also shows full-window pace, which includes the active seconds in which you were not tapping. A fast burst followed by silence can give a high stream pace but a much lower full-window pace.
3. Practise at a target tempo
Switch to Target tempo and choose a comfortable BPM from 40 to 300. There are four tapping ticks per beat. At 120 BPM that is eight taps per second; at 60 BPM it is four. The first tap anchors the timing grid. You can enable the optional metronome before starting.
Use the same rhythm for several short runs. Look for fewer same-key repeats and less interval variation. The nearest-tick early/late number is a rough timing signal, not an osu! judgement or a hardware-latency measurement.
4. Compare similar sessions
Keep duration, device, browser and input method the same. A ten-second burst and a sixty-second session answer different questions. On-screen drills are labelled separately from keyboard runs. There is no universal score you must reach.
Pause and restart
Use Pause or Escape at any time. Leaving the window or hiding the tab also pauses a run. Select Resume yourself to continue: paused time and the gap across the pause are excluded, and the next tap establishes a new target grid. Restart session discards the unfinished run; Reset returns to the setup state.
On-screen and assistive controls
Select On-screen drill to use the two pads with touch or a pointer. A focused pad also accepts Enter or Space. Keyboard and on-screen results are separate because these inputs are not directly comparable.