Build a singing drill
Choose the intervals, the direction and the octave, and sing them back. The drill listens through your microphone and nothing is recorded.
Your microphone is used to work out which pitch you are singing, in your browser. Nothing is recorded, stored or sent anywhere, and it is released the moment the drill ends.
How many rounds a session runs is not part of a drill: it comes from the session length picker above, which every exercise on the site follows.
A drill you build here is not recorded on your progress page. Progress is kept per exercise, and this one is yours rather than the site's — counting it would inflate your totals for something that appears in no list, and average sessions from settings with nothing in common.