Sing one comfortable glide from your lowest note to your highest. MercuryPitch measures the notes you actually reached and shows which of six voice types (soprano, mezzo-soprano, alto, tenor, baritone or bass) your range overlaps most.
Sing a comfortable siren from low to high and back down. MercuryPitch takes the lowest and highest notes it heard reliably and compares that span with the typical ranges of six voice types. The timed part takes about a minute, each step waits until you are ready, and you need no piano.
No, and this is the thing most tests get wrong. Range is the notes you can produce; voice type also depends on tessitura — where your voice sits comfortably for a long time — as well as timbre, register transitions and training. Two singers with the same range can be different voice types.
Not on its own, and MercuryPitch does not pretend otherwise. What it gives you is the measured evidence — your real notes, in real units — and the voice type whose range best overlaps them. Treat the label as a starting point for a conversation with a teacher, not a verdict.