This app uses your microphone for real-time pitch detection. All audio is processed locally in your browser — nothing is ever sent over the network or saved to disk.
—Press a button to start
Sing back random notes and get accuracy feedback. Notes play roughly every 4 beats at the current BPM.
Notes play automatically at the current BPM — hear it, sing it back. Report appears at the end. Requires microphone access.
Visit sebastiancruznotes.com/RNG/ in your browser and follow the steps for your device:
🍎 iPhone / iPad — Safari
Tap the Share button (box with arrow) → scroll down → tap Add to Home Screen → tap Add.
🍎 Mac — Safari
In the menu bar go to File → Add to Dock. The app will open in its own window without browser chrome.
🖥️ Mac / Windows / Linux — Chrome
Look for the install icon (monitor with down arrow) in the address bar → click it → click Install. If you don't see it, try the three-dot menu → Cast, save, and share → Install page as app.
🤖 Android — Chrome
Tap the three-dot menu → tap Add to Home screen → tap Install.