Sing one glide from your lowest comfortable note to your highest. MercuryPitch measures the notes you actually reached and shows you a singer whose range covers the same ground, on a card you can keep or share.
It compares the lowest and highest notes MercuryPitch measured from your glide against the ranges well-known singers are documented as covering, and shows the closest fit. The comparison is arithmetic on notes, not an opinion about your voice.
No. It means you cover similar notes. Timbre, weight, vibrato, accent and technique are what make a voice recognisable, and none of those are being compared here. Someone can share a range with a singer and sound nothing like them.
No. The measurement is of which notes you reached, not how good they sounded, so a rough glide still gives a usable range. Sing at a comfortable volume and do not push for extra notes at either end — a strained note is not part of your working range.