Radi
The proof
Access Lab
Everything on this page is measurable. The visualiser shows the filter separating tremor from intent in real time; the target range turns Assist into a miss-rate you can compare; the trainers let you tune dwell and hear the echo map on a page built for it. If your hands are steady, use the tremor slider — it adds the shake so you can feel the fix.
1 · Tremor visualiser
Move your pointer inside the canvas. The red line is the raw input the browser reports; the teal line is what the 1€ filter hands to the page. Push the simulated tremor up and watch the red line shake while the teal one keeps your intent.
2 · Target practice
Five targets, 74 px down to 42 px. Hit them in order; any press that lands off-target counts as a miss. Run it once with Kinetic Assist off, once with it on (Alt+K, or the Access panel — add simulated tremor if your hands are steady), and read the two runs side by side.
No run yet.
Without assist
— missesNot run yet
With Kinetic Assist
— missesNot run yet
3 · Dwell trainer
Three targets for practising hold-to-activate. Adjust the hold time in the Access panel (400–2400 ms); the countdown ring draws around the cursor while you hold.
Dwell fires a real click — these targets also work with mouse and keyboard.
4 · Echo map demo
A simplified five-landmark page. Press the button (headphones recommended) and each landmark pings once in positional audio — left, right, above, below — followed by its spoken name. The transcript appears at the corner of the screen as it runs.