# Tone Generator: Audio Sound Hz — Generate Audio Frequency Waves

> Generate pure sine wave audio tones from 20Hz to 22,000Hz. (iPhone/iPad app by TMSOFT.)

- Source: https://appshunter.io/ios/app/tone-generator-audio-sound-hz/id1206449238 (this page in markdown: same URL + `.md`)
- Developer: [TMSOFT](https://appshunter.io/developer/288669797)
- Category: Music, Utilities
- Price: Free
- Rating: 4.70/5 from 2,583 App Store ratings · 233 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 25 MB
- Languages: American English
- Released: 2017-03-02
- Data updated: 2026-08-26
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/tone-generator-audio-sound-hz/id1206449238/reviews.md

## What is Tone Generator?

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?

Directions:
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 http://www.tmsoft.com/

## Key features

- Generate sine wave tones
- Frequency range 20Hz - 22,000Hz
- Instrument tuning
- Hearing tests
- Science experiments
- Audio equipment testing
- AirPlay support

## What do users think of Tone Generator?

Overall sentiment: positive

**Pros**

- 👍 Simple and straightforward
- 🚀 Works as expected
- 💡 Useful for testing and tuning
- 💡 Helps identify hearing range

**Cons**

- 🐛 Ads can interfere with usage
- 🔧 Difficulty fine-tuning frequency
- 🔧 No amplitude/volume display
- 🔧 Limited functionality

**Commonly reported bugs**

- Sound cuts out when changing frequency
- No sound output on some devices
- Ads block access to controls

**Most requested features**

- Add frequency sweep/sweep function
- Allow manual frequency input
- Provide volume/amplitude display
- Implement more precise frequency control
- Add timer/sleep function

## Recent user reviews (10 of 233)

All indexed reviews: https://appshunter.io/ios/app/tone-generator-audio-sound-hz/id1206449238/reviews.md

### 5/5 — Fire update

*2026-08-17*

The update made the app perfect

### 5/5 — I

*2026-08-14*

Super application, je l’utilise presque tous les jours

**Developer response:** Thank you for your encouraging words and 5-star rating!

### 5/5 — Very useful tool

*2026-07-30, version 5.0.4*

Very useful tooi. I am a radio ham and can use it to test audio filters in my equipment.it also shows how my own hearing has changed with age.

### 5/5 — Good sine wave tool

*2026-07-26, version 5.0*

Good simple  tone oscillator, can double as a tuning source for musical instruments. A4 = 440.  Presets can be created for stringed instruments.

### 5/5 — best one i could find!

*2026-07-25, version 5.0*

best one i could find, simple and does exactly what it needs to and has the ability to go much louder than the others. but can you make it go below 20 hz? like down to 5 or something?

### 5/5 — Let’s gooo

*2026-06-30, version 4.0*

The app design is great. The program is great.

### 3/5 — Need change bad

*2026-06-02, version 3.0.9*

It would be great if you can do up to 10 tones playing all at the same time but it’s only subpar

### 4/5 — Slide Control Only

*2026-05-28, version 3.0.9*

Being able to choose frequencies with a keyboard would be much more user-friendly than a slider.  In cases where small adjustments in frequency are required, and the exact frequency is not known beforehand, '+' and '-' buttons would come in handy.

Update:  The developer instructed me to upgrade the app, which happened automatically when I opened it.  When the app is opened, a frequency is displayed on what is actually a field for entering a frequency number, but which looks like a button-shaped display.  Not the most intuitive choice.  I would have gone with something that spelled that out, say, "Enter frequency.".

### 5/5 — Papa

*2026-05-27, version 3.0.8*

I downloaded this app and it’s great, many things i’ve learnt for my physics exam coming up and it was something really fantastic for my education. Totally recommend if a sausage is wanted in your hole.          

🥺👉🏼👈🏼

### 1/5 — Ruined

*2026-05-21, version 3.0.5*

The last update ruined the ability to control the volume of the tone.

## Frequently asked questions about Tone Generator

### What does the Tone Generator app do?

This app generates pure sine wave audio tones at frequencies ranging from 20Hz to 22,000Hz. It's designed for various applications like tuning instruments, conducting hearing tests, performing science experiments, and testing audio equipment.

### What are the main uses for this tone generator?

Key uses include performing hearing tests to determine the lowest and highest frequencies you can hear, tuning musical instruments like guitars to specific frequencies (e.g., 440 Hz for Low E), conducting science experiments such as finding the resonant frequency of a wine glass, and testing audio systems like subwoofers.

### How do I control the audio frequency and volume?

You can adjust the audio frequency by dragging a slider or tapping the plus/minus buttons. The device's volume can be controlled using an on-screen volume slider. Audio playback can be toggled on and off with a Play/Pause button.

### Is this app compatible with AirPlay devices?

Yes, the app allows you to specify playing audio to any AirPlay supported device. This extends its utility for testing audio setups or for listening to generated tones on external speakers.

### Is the Tone Generator app free to use?

The app is free to use and is supported by advertisements. There are no in-app purchases mentioned, indicating a straightforward ad-supported model.

## Version history (last 5 releases)

### 5.1.1 — 2026-08-18

- Added a new setting to continue playback through a headphone or Bluetooth disconnect
- Fixed Reduce Interruptions turning itself on
- Other minor bug fixes

### 5.1 — 2026-08-17

- Added a new setting to continue playback through a headphone or Bluetooth disconnect
- Fixed Reduce Interruptions turning itself on
- Other minor bug fixes

### 5.0.4 — 2026-07-29

What's New in 5.0

• All-new audio engine built for smooth, gapless playback
• Tones are now generated in realtime — frequency changes apply instantly without restarting playback
• Bug fixes

### 5.0 — 2026-07-21

What's New in 5.0

• All-new audio engine built for smooth, gapless playback
• Tones are now generated in realtime — frequency changes apply instantly without restarting playback
• Bug fixes

### 4.0 — 2026-06-29

What's New in 4.0

- Fractional tones - set frequencies to a hundredth of a Hz
- Redesigned tone picker - type an exact frequency or choose a musical note + octave on a built-in piano keyboard, with live preview and smooth fades as you adjust
- Preset Manager - a dedicated screen to create, edit, rename, and reorder presets
- Primary Volume setting - choose whether the slider controls the app sound or device volume
- Step Amount setting - customize how much the +/- buttons change a value
- Sleep timer now supports up to 12 hours
- Further improved Reduce Interruptions for more reliable playback through audio interruptions
- Improved UI - values now appear as buttons you can tap to enter an exact amount or bring up the new tone picker

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## More apps by TMSOFT

- [Fart Cushion](https://appshunter.io/ios/app/fart-cushion/id289738462)
- [White Noise](https://appshunter.io/ios/app/white-noise/id289894882)
- [White Noise Lite](https://appshunter.io/ios/app/white-noise-lite/id292987597)
- [Card Counter](https://appshunter.io/ios/app/card-counter/id293742180)
- [Audiogasm: Music Visualizer - Real time animation of audio and music for iPhone, iPod touch, and iPad](https://appshunter.io/ios/app/audiogasm-music-visualizer-real-time-animation-of-audio-and-music-for-iphone-ipod-touch-and-ipad/id301351375)
- [Springer](https://appshunter.io/ios/app/springer/id309210359)

All apps by TMSOFT: https://appshunter.io/developer/288669797

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*