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Audio Function Generator

Audio Function Generator

Frequency and Signal Generator

2.2K ratings
271 reviews
🔧 Utilities
🎵 Music
Free
In-App Purchases

Details

  • Released
  • Updated
  • December 9, 2013
  • September 2, 2026

Features

Developer

Thomas Gruber
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Audio Function Generator screenshot #1 for iPhone
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Audio Function Generator screenshot #8 for iPhone
Audio Function Generator screenshot #9 for iPhone
iphone
ipad
🧾$9.99
In-App Purchase↘︎
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Reviews summary↘︎
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❓5 answered
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About

Generate various audio test tones, including sine, square, triangle, and sawtooth waves. Explore frequency and volume sweeps, noise generation, and custom preset creation. Advanced features like extended frequency ranges and multi-tone playback are available with an upgrade.

✓Generate sine, square, triangle, and sawtooth tones
✓Frequency and volume sweep generation
✓Noise generation (white, pink, violet, etc.)
✓Custom preset creation and saving
✓Extended frequency range (PRO feature)
✓Multi-tone playback (PRO feature)
Show original description

What users say

Summarized from real user reviews of Audio Function Generator. Based on 2.2K reviews and a 4.7/5 average, it highlights the 9 positives and 7 negatives reviewers mention most about this Utilities app.

Positive things

  • 👍Great app
  • 🎶Helps with Tinnitus
  • 💯Best app I've paid for
  • 🔍Highly recommended
  • 🎨Attention to detail
  • 🔧Useful for testing and calibrating
  • 🚀Excellent functionality
  • 🤖Intuitive interface
  • 🎛️Comprehensive features

Negative things

  • 🐛Crashes
  • 💰Deceptive/Money hungry
  • 🔒Basic features paywalled
  • 🔒Limited without paying
  • 🔒Removed functionality to push paid version
  • 🔒Frequencies locked behind paywall
  • 🔋High battery consumption
See all reviews

What's New in Audio Function Generator

9.3.0

September 2, 2026

User interface improvements for the DualTone generator Sequence Playback (MultiTone) UI optimisations Dark Mode improvements

More
3

In-App Purchases

$9.99

Upgrade to PRO

Enable all Features and upgrade to PRO

User reviews

Most RecentHighest RatedLowest Rated

Under 100hz locked

That looks beautiful, but the free version doesn't give you anything under 100 Hz. Was going to buy some PA speakers and wanted something to test, but without this functionality, I'll never think about upgrading.
Toronto TheoToronto Theo

👍🏼🔥

Спасибо, это то что я искал.
AlishasweetAlishasweet

Well done!

This app is very well designed and useful for an array of tasks. I love it and highly recommend it!
Butu333Butu333

Worst app I’ve ever tried in my whole life

This is the most poorly designed app I’ve ever seen in my whole life. I work with software and apps all the time. I’ve seen all kinds, but this takes the cake as the absolute worst. Horrible user experience. There is literally no way to just set a frequency and have it play indefinitely. That’s not even an option. The frequency constantly rises when you said it at one thing and it gets higher and higher and then it cuts off after a certain amount of time. There is absolutely no option to make the frequency stay steady. There is no option to make it play indefinitely. All of the commands and the buttons are grouped in a horrible way
Show more
TedonchiTedonchi

A. F. G.

Can’t do anything without upgrading to the paid subscription.
eightysixblazereightysixblazer
See 266 more reviews

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User experience

🐞

Reported Bugs

4 issues

Crashes on launch

Bug

Volume slider issues

Bug

Airplay not working

Bug

Sound distortion when display is active

Bug
✨

Requested Features

6 requests

Add download/save feature for custom sounds

Feature

Improve sweep function (continuous mode, better frequency control)

Feature

Add more multi-frequency rows

Feature

Implement 432Hz base frequency option

Feature

Add phase control for noise generators

Feature

Improve accessibility (VoiceOver support)

Feature

FAQ

What does the Audio Function Generator app do?

This app functions as a powerful and intuitive tone and signal generator. It allows users to create and play various audio test tones, including sine, rectangular, triangular, and sawtooth waves. You can also generate frequency and volume sweeps, experiment with different types of noise, and save custom presets for quick access.

What are the key features of the Audio Function Generator?

Key features include the ability to play standard test tones, perform frequency and volume sweeps, generate various noise types, and create/save custom presets. Advanced features, available with a PRO upgrade, extend the frequency range, sweep times, allow for individual channel selection, and enable multi-tone playback.

Is the Audio Function Generator free to use?

The app is free to download and use with its core functionalities. However, certain advanced features, such as an extended frequency range, longer sweep times, and multi-tone generation, require an upgrade to the PRO version.

What kind of tones can I generate with this app?

You can generate several fundamental test tones, including Sine, Rectangular, Triangular, and Sawtooth waves. The app also supports playing music tones and various types of noise like White, Pink, Violet, Grey, Brown, and Blue.

Who would benefit from using the Audio Function Generator?

This app is beneficial for a wide range of users, including audio engineers, technicians, hobbyists, and musicians who need to test audio equipment, calibrate sound systems, or experiment with sound frequencies. Its intuitive design makes it accessible for both beginners and advanced users.