Listen, sing it back in your head, then reveal the answer.
The answer: C♯ – C – A♯ – C♯ – D♯ – F – G♯
This app does not replace a teacher. It is an aid that supports ear training: it makes practice measurable, makes repetition unlimited, and shows where you went wrong as a number. It does not measure timbre, expression, breath or musicality — the things a human hears — and never claims to.