Glide from your lowest comfortable note to your highest and back. MercuryPitch measures the notes you actually reached, places your range in one of six voice types and introduces a famous singer of that type, on a card you can keep or share.
MercuryPitch compares the lowest and highest notes it measured from your glide with the typical ranges of six voice types, from bass to soprano, and picks the type your range overlaps most. You then meet a famous singer of that type, and the same range always meets the same singer. Picking the type is arithmetic on notes, not an opinion about your voice.
No. It means your range points to the broad voice type that singer is listed under. Timbre, weight, vibrato, accent and technique are what make a voice recognizable, and none of those are being compared here. Someone can share a voice type 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.