Scoring
What your score measures, and what it doesn't
After you sing the reversed line, Reverse Song flips your attempt back to forwards and compares it with the original recording. The result is a number out of 100. Here is exactly what goes into it, so you know what to work on.
Melody
The app tracks the pitch of both recordings over time and compares them note by note. Each moment is scored by how many semitones apart you are: close earns full credit, and about three semitones or more earns none for that moment.
Timing
The two recordings are lined up against each other. Timing rewards an attempt that follows the original's pace evenly, without rushing one half and dragging the other, and that is close to the original's length overall.
Your voice, your octave
Melody is compared within one octave. If the original was sung high and you copy it an octave lower, the notes still match and you aren't penalised. What matters is the shape of the tune: which notes go up, which go down, and by how much.
Score bands
Every score comes with a label, so a number always means the same thing:
The Result screen also shows the melody and timing parts separately, so you can see which one pulled your score down.
When there's no score
If the app can't hear a voice in your attempt (it was silent, or too quiet), it asks you to try again instead of giving you a low score. A score for silence would tell you nothing.
What the score can't judge
Background noise, music playing nearby, and very breathy singing can all make pitch harder to track, which can lower a score that sounded fine to you. A quiet room and a steady voice give the most consistent results.
Want a better number? Our tips to improve your score map each habit to melody or timing, and why your attempt sounds wrong covers the most common problems.