How fast can you
really scroll?
Pick a sprint, put your finger on the wheel and go. The challenge tracks your events per second, catches your peak burst and keeps a local leaderboard. A wheel that stutters under speed will show it here first.
Scroll as fast as you can when the timer starts
One notch after another — rhythm beats flailing. Your rate meter above shows whether the wheel keeps up with your finger.
Sprint Result
—- Average rate
- 0.0/s
- Peak burst
- 0.0/s
—
Leaderboard
| # | Events | Rate | Sprint | Date |
|---|
Three seconds of setup, then floor it
Choose your sprint
5 seconds is an all-out burst, 10 is the standard challenge, 15–30 punishes wheels that fade mid-run. The leaderboard ranks by events per second, so sprints stay comparable.
Scroll flat out
Roll the wheel one notch after another for the whole countdown. The live rate meter shows events per second while the bars chart your rhythm second by second.
Beat your best
Your average rate, peak burst and personal best are saved on your device. Copy the challenge link and send it to a friend — the leaderboard stays local, the bragging rights don't.
A fast wheel hides nothing
Dust on the encoder often slips through a casual test — the wheel feels fine at a relaxed pace. At sprint speed the contacts have to fire dozens of times a second, and a dirty encoder starts dropping or bouncing ticks exactly there. If your rate collapses partway through the sprint, run the full scroll test for the diagnosis.
No accounts, no servers
The leaderboard lives in your browser's storage. Nothing is uploaded, no sign-up is required, and clearing site data wipes it. Share links only carry your score in the URL — see the privacy policy for the full detail.
Fast is fun. Healthy is what keeps you fast.
No ads · No tracking · No account · Runs in your browser