Free · no microphone · one thumb
Tap tempo
Tap the big pad along with a song, a drummer or the beat in your head. The tempo shows from the second tap; after eight you get the average and how steady you were. Stop, and the click carries on at your tempo so you can hear if it's right.
Tap on the pad, or press Space on a keyboard. Pause for a few seconds to start over.
What this does, and what it doesn't
It measures the time between your taps and turns it into beats per minute: 60 divided by the gap in seconds. The big number follows your last few taps, so it answers when the song speeds up; the average counts every tap since you started. Steadiness says how even the gaps were: 100 % is a drum machine, most careful hands land between 70 and 95.
Most pop and dance music sits between 90 and 130 BPM, house around 120 to 128, drum and bass near 170. If the number looks half or double what you expected, you tapped every other beat or every half beat; both are right, they just count differently. Nothing is recorded: no microphone, only your taps.
Then make something of it
The door opens Brumm, a club track with a beat and a bass, with your beat in it as a bass note on every beat. No account, no upload: the tempo travels inside the link itself. Hum a line over it, and it becomes an instrument.
Your taps stay on your phone: the tool counts them in the browser and keeps nothing. How the site counts visits.