Tuning Fork

Tuning Fork is a precise digital reference-tone generator — like a real tuning fork, but for every note and frequency. It plays a clean pure sine tone at A4 440 Hz by default, and lets you dial in any pitch you need.

Unlike a microphone tuner that "listens" to your instrument, Tuning Fork "produces" the exact tone you want to match — a perfect companion to any tuner app.

★ What you can do
• Play a precise reference tone and tap again to stop
• Pick any frequency from 20 to 5000 Hz with the slider, +/- fine-tune, or type it in
• Choose any of the 12 notes (C to B) across octaves 2–6
• Set the concert pitch A4 from 415 to 466 Hz (440 standard, 442/443 for orchestras, 415 for baroque)
• Switch waveform: sine (purest), square, or triangle
• Adjust volume and set an auto-stop timer (3 / 5 / 10 s) or play continuously

★ Perfect for
• Tuning piano, guitar, violin, wind and other instruments
• Finding your starting pitch for singing and choir
• Orchestra and band reference tones
• Music teachers and students

★ Built right
• All notes calculated with exact equal-temperament math — no guessing
• Beautiful Material You design, light and dark mode
• 37 languages
• Works fully offline — no microphone, location, or camera permission needed

★ Note on accuracy
The tone frequency is synthesized precisely, but the sound you actually hear depends on your speaker and device frequency response, especially at low frequencies. This app does not replace a professional hardware tuner.

Tap play and get your reference pitch now.