Tone Generator: Audio Sound Hz 4+

Generate Audio Frequency Waves


Designed for iPad

    • 4.7 • 1.4K Ratings
    • Free



Generate pure sine wave tones at frequencies from 20hz to 22,000hz. Tone generation is useful in tuning instruments, hearing tests, science experiments, and testing audio equipment.

Tone Generator has many uses:
- Hearing Test: What is the lowest/highest frequency you can hear in each ear?
- Tuning Instruments: Does your top guitar string match Low E at 440 Hz?
- Science Experiments: What is the resonant frequency of your wine glass?
- Audio System Test: What frequencies does your subwoofer support?

Adjust audio frequency by dragging the slider or tapping the plus/minus buttons. Adjust device volume using the on-screen volume slider. You can also specify to play audio to any AirPlay supported device. Toggle audio playback using the Play/Pause button.

Created by the audio experts at TMSOFT that brought you the famous White Noise app. Check out all our apps and sounds at

What’s New

Version 2.1.3

- Fixed bug that was resetting Presets occasionally
- Updated layout and theme for modern iOS
- Support library updates

v2.0 brings a host of new features including:
- New control bar at the bottom of the view to control playback, volume, airplay, and balance
- Added balance control beneath volume on the control bar. Expand the control bar by swiping up or tapping to reveal balance control
- Redesigned layout to make better use of available space and modernize icons
- Added ability to use keyboard input for Hz values. Tap the value label to bring up the keyboard
- Added a sleep timer which can be set from 15 min to 8 hours in 15 min intervals
- Added user configurable presets. Save your favorite configurations and switch between them easily
- Added reset option which reverts controls back to their defaults
- Enabled mixing with music: you can now listen to other media apps alongside Tone Generator

Many of these features were from user requests, so please keep the feedback coming!

Ratings and Reviews

4.7 out of 5
1.4K Ratings

1.4K Ratings

splatini ,

Simple and effective

I like how simple and effective this tone generator app is.

I already purchased White Noise from this company and use it regularly to create a tranquil atmosphere at home or in the office.

I’d love to have some additional features in this tone generator app.

1. Pulse - the user can have the tone pulse on and off automatically. Allow the user to select the length of “on” time and “off” time.

2. Audio Channel - the user can select which audio channel(s) the tone is sent through. Allow the user to select an option to alternate sending the tone to the left and right audio channels. Allow the user to set the switching speed to control how often the tone switches between the left and right audio channels. The audio channel options could be:
- Stereo
- Left Channel
- Right Channel
- Alternate Channels (with speed selection of “Alternate ____ times per minute”)

Thanks for great apps!

aaronchasemusic ,

Tons of potential

I love that it’s simple, but it’s a little bit too simple. Its almost impossible to choose a specific frequency on the high end. There’s a plus and minus button that moves up or down one single hz, which is practical at 60 hz, but silly at 16,237. You can also drag the slider but its nearly impossible to set it to 16,000 or 18,000 or 15,500, or anything specific. You have to settle for 18,342 and be grateful that you got that close, or maybe if you really want push the minus button 342 times to get to your goal frequency. Also it doesn’t make sounds while you’re sliding the slider.

Perhaps being able to zoom in on the frequency spectrum to get to specific spots, or as Apple does, a low speed scrub as you move your finger further from the slider. Idk, but it needs something.

Almost a great app, but falls short of being useful.

Developer Response ,

Thank you for your feedback! We do appreciate providing us insight on your thoughts about the app. We will taking your feedback into consideration and see if these are updates we are add to a future version. We appreciate you taking the time to let us know what you think!

Dudeithinkyurgay ,


The app does exactly what you want it to do it perfectly It dabbles into “theoretical” science behind frequencies but there is more science to theorize through a harmonization function or a echo chamber function with headphones and most crucial to me is a two frequency function to have headphones and have one side one frequency and the other another one I hope I can indulge in these functions so I can get some longevity out of the experimental aspect of this app

App Privacy

The developer, TMSOFT, 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 Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Identifiers

Data Linked to You

The following data may be collected and linked to your identity:

  • User Content

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers
  • Usage Data
  • Diagnostics

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

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