Sing one held note and see whether your vibrato is free, too fast, too slow or wide, uneven, or a straight tone. Vibrato Check measures your vibrato on your phone, with no account and no server.

What it does

• Hold a button, sing a vowel on one note for 3 to 8 seconds, and let go: you get a plain verdict and one thing to try next.
• Shows the vibrato's rate (Hz), width (cents) and evenness, plus the note you sang.
• Plays your vibrato back as vibration ("Tap to feel it"), so you can feel a calm pulse versus a nervous flutter.
• Keeps the takes you save, with a 7- and 30-day chart of your vibrato rate, and lets you pin a target take (for example one your teacher liked).
• Everything runs on your phone and works offline.

How to use

1. In a quiet room, open Sing and tap Measure room once. The app sets a threshold just above your room's noise.
2. Hold Hold to sing, sing an "a" on a comfortable note, and keep it going for 3 to 8 seconds.
3. Let go. Read the verdict and the tip, and tap the wave to feel your vibrato.
4. Tap Save to keep the take. Open History to see how your vibrato changes over the week.

FAQ

What counts as a "free" vibrato? A regular wave of about 4.5 to 7.5 times per second, up to about 150 cents wide for classical singing (130 for musical theatre and pop). Choose your voice type in Settings.

My voice doesn't show on the graph. The threshold may be above your voice, or the room noise may be loud. Tap Measure room in silence, or lower the threshold in the level card, and sing closer to the phone.

Is my voice uploaded anywhere? No. Sound is analyzed on your phone. A recording is kept only if you tap Save, and it stays on your phone.

Is this medical advice? No. Vibrato Check is a practice tool. It does not diagnose any voice condition; if singing hurts or your voice changes, see a voice professional.

Why not "jitter" and "shimmer"? Those measure tiny cycle-to-cycle changes in the voice, not vibrato. Vibrato Check focuses on the slow wave you hear as vibrato.

Contact

Questions, bugs or ideas: [email protected]. We usually answer within a few days. Please include your phone model and OS version.