Hinokoto Frequency Generator
Tone, Noise & Binaural Beats
Free · Designed for iPad. Not verified for macOS.
Turn the dial to play any frequency from 20 Hz to 20,000 Hz. Test speakers and headphones, build chords and harmonics, try binaural beats, or eject water from a speaker.
Hinokoto Frequency Generator plays tones at any frequency from 20 Hz to 20,000 Hz. Turn a circular dial to pick a pitch, then play sine waves, noise, binaural beats, chords, or harmonics, with tools for checking speakers and clearing water from them.
Make a sound
- Set the frequency with the dial, by typing it in, with the slider, or with the step buttons
- Step by octave, by semitone, or by 0.01 Hz to 100 Hz. A fine mode turns the dial at 1/5 the usual speed
- Set a frequency from a note name, octave, and cents, with an A4 reference pitch from 400 Hz to 480 Hz
- Sine, square, triangle, and sawtooth waveforms
- White, pink, brown, blue, violet, and gray noise
- Twelve presets from 20 Hz to 20,000 Hz, including 440 Hz and 1,000 Hz
- Change the frequency or waveform without stopping playback
Sound modes
- Binaural beats: set a 1 Hz to 30 Hz difference between left and right. Switch to monaural to mix both tones so they work on speakers too
- Multi-tone: layer up to five tones into a chord, with chord presets covering 25 chord types and five tunings, including equal temperament and just intonation
- Harmonics: add harmonics up to the 8th over a fundamental to shape the timbre
- Isochronic tones: pulse the sound of any mode on and off at 1 Hz to 40 Hz
Check and compare
- Audibility check: plays representative frequencies in turn, with Standard, Speech, High-pitch, and Quick presets and a choice of both ears, left, or right (a simple check, not a medical test)
- Frequency sweep: choose the start and end frequencies, a length of 1 to 60 seconds, a logarithmic or linear scale, and once, loop, or back-and-forth playback
- Sound test: guided left/right, bass, and rattle-and-resonance checks
- Tone sequence: arrange up to eight tone and silence steps, up to 60 seconds in total, and repeat them
Speaker cleaner
- Water eject (100 Hz to 1,000 Hz) and dust clean (300 Hz to 2,000 Hz) modes
- Sweeps the sound up and down, then pulses it, to help push water droplets or dust out of the speaker (not a substitute for repair or drying the inside of the device)
Handy extras
- Named favorites you can edit, plus a history of the last 10 tones you played
- Share your tone settings as a link
- A timer from 30 seconds to 12 hours, with an optional fade-out before it ends
- Background playback while you use other apps or lock the screen (can be turned off)
- Play and stop from the lock screen or notification
- An option to play along with music and other apps instead of pausing them
- Haptic feedback as you turn the dial
- WAV export from 3 seconds to 5 minutes, with seamless loops and support for sweeps and tone sequences. Exported audio may be used for commercial and non-commercial purposes, with no attribution required
- Volume shown in percent and dB, plus left/right balance
- Choose a background and color palette, and pick what the home screen shows
Great for
- Checking speakers, earphones, and headphones, including left and right channels
- Finding how low your speakers go and what in the room rattles
- Sounding a reference pitch or chord when tuning an instrument
- Hearing how frequency, waveform, and harmonics change a sound
- Playing noise in the background while you work
- Trying out binaural beats and isochronic tones
- Clearing water or dust from a phone speaker
- Preparing test tones and sound material as WAV files
Good to know
- Banner ads appear at the bottom of the screen.
- No account or sign-in is required.
- Binaural beats need stereo headphones that keep the left and right channels separate. Presets and frequencies do not guarantee any effect.
- For support, choose Contact Us from the in-app menu.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- New home screen with a frequency dial
- Blue, violet, and gray noise
- Multi-tone chords, harmonics, and isochronic tones
- Sound test, speaker cleaner (water eject, dust clean), and tone sequences
- More sweep and audibility check options
- Note input, playback history, and tone links
- WAV export up to 5 minutes, with seamless loops
- Timer up to 12 hours, with a fade-out
- Lock screen controls, audio mixing, haptics, and backgrounds
- Other minor fixes and improvements
The developer, Hirohisa Fujita, 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 Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Hirohisa Fujita
- Size
- 31.9 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 Hinokoto Studio