# iFunctionGenerator — user reviews

> 15 indexed App Store user reviews of iFunctionGenerator by Black Cat Systems, rated 4.40/5 from 9 ratings.

- Source: https://appshunter.io/ios/app/ifunctiongenerator/id304851755/reviews
- App overview in markdown: https://appshunter.io/ios/app/ifunctiongenerator/id304851755.md
- Rating breakdown: 5★ 7 · 4★ 1 · 3★ 0 · 2★ 0 · 1★ 1

## Most critical reviews (10 lowest-rated)

### 1/5 — Doesn’t work with iOS 13

*2020-02-08*

Do not download. Reporting to Apple.

### 1/5 — Doesn’t work

*2019-09-20*

I just paid £2.99 for something that doesn’t even work! If you are going to charge, provide a decent app that works!!! Refund please!

### 1/5 — Pointless as there's no sound output now

*2015-03-06*

Worked one day, stopped working the next. Every other app I have makes intended sounds. This one never seems to. Completely useless.

### 1/5 — does NOT work as stated

*2011-05-16*

1. VERY poor stereo seperation.  Left and right tones bleed together.
2.  Cannot generate different waveforms for left and right channels as stated.

A non-functilnal waste of money.

### 1/5 — Junk

*2011-03-02*

I bought this by accident, I was looking at it and had no idea that it wouldnt be free but to be three dollars! Kidding me??? Horrible app for three dollars

### 2/5 — No sound output

*2013-12-23*

Info instruction tell you everything you want to know but little of use to use this .
No audible output no matter what settings you apply. Does not live up to its description  or title.
A disappointment.

### 3/5 — Somewhat buggy, but finally got it to work.

*2009-07-19*

Initially, I had an issue with turning on and off the channels on this application (I was trying to simulate a phone ringing). It would be nice if the app provider put a "mute" button on the application, and possibly, a slider/function for turning off/on the noise at periodic intervals. There also does not seem to be any about or info screen for this application.

### 4/5 — It does what I need it to do ... and very well.

*2018-05-28*

I needed a simple stereo frequency generator to produce two closely spaced audio sine-wave frequencies in order to demonstrate the “binaural beat” capability of our human minds to perform a differential frequency analysis of two discrete audio signals and present the differential to us.  This app does a beautiful job of this.  

I took one star away because it does have a minor bug of occasionally locking-up (which killing and re-opening it fixes), and the physical interface is real easy for me to “fat finger”.  

In summary, this app has both the precision and the flexibility to do exactly what I need it to do, and I am very grateful and pleased to have found it.

BTW:  The app produces discrete left and right signals with no mixing ... IF you are taking the signals directly out of your phone’s earphone port.  If you are listening to the output via a bluetooth device, then you are going to hear a whole bunch of channel mixing.  This is not the app’s fault.

### 4/5 — Release update: multi-tasking!

*2010-10-20*

Awesome App! I use it to make my own binaural beats. The only major issue I have with it is that you can't multi-task. Please please please fix this!

### 5/5 — Wizard says

*2025-06-17*

Wizard says it’s great. More power out of your apple/audiojack device if only using first channel.

## Most praised reviews (5 highest-rated)

### 5/5 — Sehr gut

*2021-04-01*

Die einzige Art meine Tinitusfrequenz zu finden

### 5/5 — Great app

*2017-06-27*

Create your own TRUE binaural beats! Great app for us geeks!

### 5/5 — Excellent app.

*2016-08-13*

Full function, intuitive, easy to use. Nicely designed.

### 5/5 — Sehr gut!

*2013-11-08*

Man kann leicht Schwebungen generieren.

### 5/5 — Easy

*2013-03-18*

Easy to use and adjust.

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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 2026-08-12.*