Comparison

Audio Function Generator vs Noise Generator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Audio Function Generator

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.

Highlights
  • 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)
Features
Read full description

This is the highly recommended and praised Function Generator App - an amazingly great and powerful tone generator. Enriched with a vast amount of features yet it is extremely intuitive and designed for simplicity. Get to know this great App now! It is very well maintained and has received considerable upgrades over the past years. So, … what can you do with this App? • PLAY TEST TONES Sine, Rectangular, Triangular and Sawtooth. • PLAY FREQUENCY SWEEP TEST TONES in both directions (minimum to maximum frequency and maximum to minimum frequency). • PLAY VOLUME SWEEPS (from minimum to maximum volume). • Try the SWEEP REPEAT / WOBBLE function. • Try the MUSIC TONES PLAYBACK. • Experiment with the huge FINE TUNE SELECTON, PRESETS SELECTION! • Or create your own CUSTOM PRESETS! • And SAVE an endless amount of CONFIGURATIONS (Frequency, Sweep, Noise) for later quick access and direct playback function. • Even play back different kinds of NOISE – White, Pink, Violet, Grey, Brown, Blue is also supported. The Function Generator is AMAZINGLY INTUITIVE and SIMPLE to use! AND THESE ARE THE ADVANCED SETTINGS/FEATURES (upgrade to PRO required): => Extending The Frequency Range (1Hz - 21kHz) => Extending The Sweep Times (0.1s - 600s) => Changing Min/Max Slider Frequency Ranges => Changing Max Sweep Time Slider Range => Changing Signal Amplitude => Enabling Of The Sweep Repeat / Wobble Function => Frequency Slider Setting to Linear or Logarithmic => Left/Right Channel Individual Selection => Permanently Saving Custom Presets => Saving Of Endless Number Of Audio Configurations => Phase Out Setting (custom phase shift of the generated signal) => BPM (Beats per Minute) Feature => Dual Function Generator => MultiTone Generator (playback of up to eight individual tones) => Background Theme Selection (Light/Dark) Check out the tutorial page: www.ee-toolkit.com/audio-function-generator

About

Noise Generator

Generate a variety of custom color noises, including brown, pink, white, blue, and violet. Fine-tune your audio experience with low and high cut filters. This app offers a simple interface that remembers your settings for quick, personalized sound generation.

Highlights
  • Generate brown, pink, white, blue, and violet noise
  • Low and high cut filters for customization
  • Simple interface remembers settings
  • Advanced mathematical formulas for audio generation
  • AirPlay support for external devices
Features
Read full description

Generate custom color noises including brown, pink, white, blue, and violet. Customize noise further by using low and high cut filters. Simple modern interface remembers all settings for quick generation and utilizes advanced mathematical formulas to generate all audio waves. There are no audio files included in the application binary which keeps app size to a minimum and app performance to a maximum. What are benefits of listening to white noise? - Helps you sleep by blocking distractions - Pacifies fussy and crying babies - Relaxes and reduces stress - Increases focus while enhancing privacy - Soothes headaches and migraines - Masks tinnitus (ringing of the ears) What are the different sound colors? - White noise sounds similar to static of an analog TV or radio station that has stopped broadcasting. White noise has equal energy across all sound frequencies. - Brown noise sounds like a powerful waterfall. It has more energy at the lower frequencies and if you have a good speaker system with a subwoofer you should be able to really feel it. - Pink noise's upper sound frequencies don't fall off as fast as they do with brown noise, so you'll get a little more punch. The most interesting thing about pink noise is it's found in almost all electronic devices (known as flicker noise) and even in biological systems. - Blue and violet noise are the opposites of pink and brown noise, respectively, and sound like spraying water from a garden hose. It has more energy at the higher frequencies which means more treble and less bass. - Curious to learn more about color noises? Check out this article for all the details: http://www.tmsoft.com/white-noise-player/ Directions: Drag the Sound Color slider to select brown, pink, white, blue, violet, or somewhere in-between. Next, drag the low and high cut filters to further customize to your liking. Adjust device volume using the on-screen volume slider to a comfortable level. 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/

Screenshots

Audio Function Generator4 screens
Noise Generator4 screens

Verdict

The call

The clearest difference is in-app purchases: Noise Generator at none against Audio Function Generator's 1. Audio Function Generator's advantage is ads (none vs shown). On price, rating, review sentiment and ratings volume there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Audio Function Generator sells 1 one-off in-app purchase. Noise Generator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Audio Function Generator against 4.7 for Noise Generator. Both are backed by a comparable volume of ratings — 2.2K and 2K respectively. Written reviews are what separate them: 77% of Audio Function Generator's written reviews are positive against 75% of Noise Generator's.

UpkeepUpdate frequency

Audio Function Generator ships an update every 6 weeks, Noise Generator every 3 weeks. Both last shipped on September 24, 2026.

Scorecard2 real differences · 8 level
Audio Function Generator versus Noise Generator: the parameters behind the verdict, then further details
ParameterAudio Function GeneratorNoise Generator
PriceFreeFree
Rating4.7 (2.2K ratings)4.7 (2K ratings)
Positive reviews77.1% of reviews — better74.7% of reviews
Number of ratings2.2K — better2K
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.514.0 — better
Further details — not scored
Size14 MB25 MB
Age rating4+4+
DeveloperThomas GruberTMSOFT

Customer experience

Audio Function Generator

All ratings2,191 ratings
Positive91.8%
Neutral3.1%
Negative5.1%
Written reviews271 reviews
Positive77.1%
Neutral6.3%
Negative16.6%

Noise Generator

All ratings1,959 ratings
Positive93.5%
Neutral3.2%
Negative3.3%
Written reviews158 reviews
Positive74.7%
Neutral8.9%
Negative16.5%

User reviews

Audio Function Generator

From 2.2K App Store ratings

What we love

  • 👍 Great app
  • 🎶 Helps with Tinnitus
  • 💯 Best app I've paid for
  • 🔍 Highly recommended
  • 🎨 Attention to detail

Room to improve

  • 🐛 Crashes
  • 💰 Deceptive/Money hungry
  • 🔒 Basic features paywalled
  • 🔒 Limited without paying
  • 🔒 Removed functionality to push paid version

Noise Generator

From 2K App Store ratings

What we love

  • 🚀 Spot on performance
  • 👍 Customizable noise options
  • 🚀 Wide range of frequency spectrum
  • 👍 Convenient for sleeping and focus
  • 👍 Helps with tinnitus and anxiety

Room to improve

  • 🐛 Crashes and stops working
  • 🐛 Ads interfere with functionality
  • 🔋 High battery drain
  • 🐛 Unreliable, cuts out randomly
  • 🐛 Detectable sound pattern loop

Bugs and requests

Audio Function Generator

Reported bugs

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

Requested features

6 requests
  • 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
Show 1 more
  • Improve accessibility (VoiceOver support)

Noise Generator

Reported bugs

3 issues
  • Scrolling issues on iPhone 13 Pro
  • Beeping noise looping in background
  • Stops playing when app is in background

Requested features

5 requests
  • Add green noise option
  • Ability to save custom presets
  • Include a sleep timer
  • Landscape mode support
  • Equalizer/smoother frequency controls

In-app purchases

1 purchases

Audio Function Generator

One-time1
  • Upgrade to PRO$9.99
None

Noise Generator

No in-app purchases

Questions

Is Audio Function Generator free?
Audio Function Generator is free to download, with in-app purchases available.
Is Noise Generator free?
Noise Generator is free to download, with no in-app purchases.
Which has better reviews, Audio Function Generator or Noise Generator?
Audio Function Generator and Noise Generator are both rated 4.7 out of 5 on the App Store, from 2.2K and 2K ratings respectively.
Do Audio Function Generator or Noise Generator have ads?
Noise Generator shows ads; Audio Function Generator does not.
Which is updated more often, Audio Function Generator or Noise Generator?
Audio Function Generator ships an update every 6 weeks, and Noise Generator every 3 weeks. Most recently, Audio Function Generator was updated on September 24, 2026 and Noise Generator on September 24, 2026.

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