# Audio Function Generator — user reviews

> 271 indexed App Store user reviews of Audio Function Generator by Thomas Gruber, rated 4.70/5 from 2,183 ratings.

- Source: https://appshunter.io/ios/app/audio-function-generator/id768229610/reviews
- App overview in markdown: https://appshunter.io/ios/app/audio-function-generator/id768229610.md
- Rating breakdown: 5★ 1,803 · 4★ 200 · 3★ 69 · 2★ 30 · 1★ 81

## What do users think of Audio Function Generator?

Overall sentiment: neutral

**Pros**

- 👍 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

**Cons**

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

**Commonly reported bugs**

- Crashes on launch
- Volume slider issues
- Airplay not working
- Sound distortion when display is active

**Most requested features**

- Add download/save feature for custom sounds
- Improve sweep function (continuous mode, better frequency control)
- Add more multi-frequency rows
- Implement 432Hz base frequency option
- Add phase control for noise generators
- Improve accessibility (VoiceOver support)

## Newest reviews (10 of 271)

### 2/5 — Kein 50 Hz Test mehr

*2026-01-28, version 9.0.1*

Leider muss man das App kaufen um einen soundtest unter 100 hz machen zu können. Das ging vor einiger Zeit noch!

### 4/5 — why TWO signal generators, big $$$

*2025-12-19, version 8.4.0*

hey Thomas!  greetings from Cowgary! great work!! amazing functionality, flexibility, usability and excellent engineering in these apps! i have used three of your apps without knowing you were the author of each. i'm a journeyman, technician, technologist, engineer, musician, editor, dev, etc, so its a no-brainer i would find and use your apps. Outstanding work! All your apps deserve 5 STARS across the board, no question! however i must apologize that i have not used your TWO signal generators enough, less than 10 hours, to know why you have two, and even worse today when i need a full-featured PRECISION SIGNAL GENERATOR i see they are both a little pricey ($20+can on appstore) and the package deal of $36+can for two generators and a circuits app (i'm not likely to use) is really no bargain for me when i only need one generator. So i can't decide which one to purchase until i learn much more about both of them.....  and in the back of my mind i am wondering if there are any other precision signal generators that will do the peculiar job i need (spectral sweeps) and don't cost as much. I have a lot going on in the lab so my frequency sweeps project will have to be back-burnered for now. the last thing i need is to blow $24can on the wrong generator app. (yeah, i already have at least ten signal generator apps)

### 4/5 — Great app

*2025-11-06, version 8.4.0*

Thanks for the help with creating this app, it’s been a beautiful way to enhance my knowledge of frequency and help me discover more possibility with the world around me. keep up the good work, 
With much love and resolve, Nige

### 1/5 — Charge

*2025-04-05, version 8.2.0*

Downloaded app, doesn’t do what I want. Then out of blue I get a charge. Um hello it’s illegal to just charge people without their permission

### 1/5 — Seit dem Update keine Frequenzen unter 100 mehr verfügbar

*2025-03-31, version 8.2.0*

Unglaublich, seit dem Update keine Frequenz mehr unter 100 Hz möglich, was jahrelang immer machbar möglich war absolute Frechheit

### 1/5 — Basic features paywalled after update

*2025-03-22, version 8.2.0*

The use of an update to remove the full frequency range without paying a subscription is absurd and unacceptable.

### 2/5 — Good but..

*2025-03-12, version 8.2.0*

Suddenly removed functionality in existing app to push paid version.

### 1/5 — Need to pay for what I want!

*2025-03-09, version 8.2.0*

Not good! I needed to pay for all of its features including to extend the frequency range because the free version of the app only has a frequency range from 100 Hz to 10 kHz and I don’t like that! This app also has frequency sweeps but the free version of the app only makes it so the frequency sweep setting can only be set at 440 Hz to 1 kHz which I do not like! There are so many more features that I needed to pay for to even do those! The price for all those features is $8.99 but my mom and dad does not allow my to pay for apps that are like these!

### 1/5 — I didnt sign up for pro

*2025-02-27, version 8.2.0*

How do i cancel?

### 1/5 — Limited

*2025-02-17, version 8.2.0*

I updated the app and all of a sudden available ranges disabled, unless i upgrade to paid version can’t use it the way I always used it. It’s useless to me now. I’ll find another app that doesn’t limit the frequencies. Dev; instead of crippling your software, introduce new features and offer them in a pro version. You are giving a middle finger to everyone who downloaded your app before you decided to cripple it.

## Most critical reviews (10 lowest-rated)

### 1/5 — Under 100hz locked

*2026-08-17, version 9.2.0*

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.

### 1/5 — Worst app I’ve ever tried in my whole life

*2026-05-10, version 9.1.0*

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

### 1/5 — A. F. G.

*2026-03-28, version 9.1.0*

Can’t do anything without upgrading to the paid subscription.

### 1/5 — Funktionseinschränkung seit neuestem

*2025-10-23, version 8.4.0*

Früher war auch bis 20kHz die Nutzung möglich - inzwischen nur noch bis 10kHz

### 1/5 — Deceptive

*2025-08-22, version 8.4.0*

To listen to tones above 10k, you need to pay for the pro version.

### 1/5 — Crashes

*2025-05-19, version 8.3.1*

It just crashes every time it’s opened. It’s up to date as per the App Store.

### 1/5 — You'd be better off whistling

*2025-05-02, version 8.2.0*

U cant generate sounds under 100hz anymore... Including EVERY IMPORTANT SOUND (25.125hz limit of human hearing, 40hz, 60hz, 70hz basically anything that sounds good) and you cant even go that high either. Just put (SILENT) adds in the app instead of ruining it. And either way SPEAKERS CAN GENERATE SIGNALS HIGHER AND LOWER THAN 21Hz & 21kHz (usually 8hz-25khz) SO EVEN IF YOU PAY YOURE NOT GETTING THE BEST

Edit to response:
It’d cost me less to buy a dolphin and train them to whistle than to but this moneypants app. We will resist your sonic monopoly. Freedom is privilege unless extended to all!!!

### 1/5 — Developer got greedy

*2025-05-01, version 8.2.0*

Just about everything in the “pro” version was 100% free before February 2025. Google has free 1hz generators bro.

### 1/5 — Money hungry

*2025-04-21, version 8.2.0*

Used to be useful for diagnosing vehicles, now it wants you to pay for the lower frequency

### 1/5 — Trash app

*2025-04-12, version 8.2.0*

원래는 20hz까지 내리는것도 무료였는데 왜 지금은 돈을 내야합니까

## Most praised reviews (10 highest-rated)

### 5/5 — 👍🏼🔥

*2026-07-21, version 9.2.0*

Спасибо, это то что я искал.

### 5/5 — Well done!

*2026-07-08, version 9.2.0*

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

### 5/5 — VERY SOLID APP!!

*2026-02-14, version 9.0.1*

Seemingly almost zero complaints aside from the stop playback timer not functioning as intended. Other than that a very solid and a highly recommended purchase for those wanting such utility!

### 5/5 — Additional Functionality Suggestion

*2026-02-01, version 9.0.1*

Add notch filter to noise function, so that app can potentially be used for tinnitus relief. Include adjustable frequency for upper and lower drop off points and Q adjustability.

### 5/5 — Helps with my Tinnitus

*2025-08-18, version 8.4.0*

This is a great tool for those that can us it as a sound therapy for Tinnitus. I set this app to control mine.. Works great!

### 5/5 — Seit kurzem nutzlos

*2025-07-30, version 8.4.0*

Mit dem Update 02/25 ist der bassbereich <100Hz gestrichen worden. Der war sehr nützlich um raummoden zu finden oder Lautsprecher zu reconen. Damit ist die App in der kostenlosen Version für mich nach vielen Jahren nutzlos geworden.

Nun ist die Funktion tiefe Noten zu spielen wieder da, und die App bekommt verdiente fünf Sterne von mir. Danke dafür 👍

### 5/5 — I love this app.

*2025-07-22, version 8.4.0*

I love to play around with this app and discover more and more features every time I touch it. The tutorial opens up the world of signal generation and so much more. 
Love this app! The pittance I paid  
to unlock the advanced features was well worth it. I am not a paid reviewer.

### 5/5 — Best app I’ve ever paid for

*2025-06-12, version 8.4.0*

In terms of straightforwardness and functionality this app is best in the market. I’ve tried all the tone apps for a very long time. THIS one has amazing attention to detail and fine tune functionality settings. But the main thing is that it works and it is reliable for a variety of needs in this area of utility. Also the dev is super nice and knows what he’s doing. All in all worth paying for imo great app!

### 5/5 — Sweep duak channel

*2025-05-07, version 8.3.0*

It would be great to have sweep sine in one channel while sweep burst in the other channel

### 5/5 — Highly recommended

*2025-03-27, version 8.2.0*

This App is super PRO

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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 2026-08-25.*