PureTone: Frequency Generator

Tone Generator & Speaker Test

Only for iPhone

Free · In‑App Purchases

iPhone

No ads. Clean 1 Hz - 22 kHz tones for testing speakers and tuning instruments. A tone generator without ads, before or after you buy anything. [The exact frequency you want] • 1 Hz to 22,000 Hz • Log-scale slider, so low frequencies are easy to hit • Type a number, or nudge by ±1 / ±10 / ±100 Hz (hold to repeat) • Tap a recent frequency to go straight back to it [Clean sound] • Sine, square, triangle and sawtooth • All four are band limited, so nothing sounds that you did not ask for • Change frequency, waveform, volume or balance while playing, without clicks • Watch the waveform of whatever is sounding [Notes] • Press a one-octave keyboard and hear the note • Octave and semitone steps, C0 to B8 • A4 reference 415-466 Hz — for an orchestra at 442 Hz, or baroque pitch at 415 Hz • Solfege or letter names [And] • Balance, with left / center / right in one tap • Keeps playing with the screen off; stop it without opening the app • Every tab remembers its settings, so they are there next time [Hearing] • A heads-up when the level or the frequency climbs, and one tap to turn it down • Headphones get the warning earlier, because they reach the ear louder [Pro pack — one purchase, yours to keep] • Sweep: start and end frequency, duration, linear or log, repeat • Dual tone: a different frequency in each ear • Presets: save and recall named setups, per tab • Stop timer • WAV export: 16-bit stereo, 44.1 / 48 kHz, up to 300 seconds [Use it for] • Testing speakers, headphones and subwoofers, checking left and right • A reference pitch for tuning an instrument • Physics and music lessons, experiments with sound and waveforms • Finding the range of frequencies you can hear [Privacy] • No personal data collected. No accounts, no servers, no analytics. • Never asks for the microphone. Note: phone speakers may not reproduce very low or very high frequencies. Use headphones or an external speaker. Note: this app is not a medical device and is not intended for diagnosis or treatment. Note: loud sound can damage your hearing. Start at a low volume.

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The developer, KIL SANG JUNG, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    KIL SANG JUNG
    Size
    20.3 MB
    Category
    Utilities
    Compatibility
    Requires iOS 15.0 or later.
    • iPhone
      Requires iOS 15.0 or later.
    • iPod touch
      Requires iOS 15.0 or later.
    Languages
    English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © 2026 SUPERPANDA
  • Privacy Policy

    • More by KIL SANG JUNG

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