Comparison

Audio Function Generator vs Frequency Sound Generator App

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

Frequency Sound Generator App

Generate sound frequencies from 1Hz to 25,000Hz with a simple interface. Features include wave visualization, adjustable sensitivity, and multiple waveform options. Use it for hearing tests, pet training, or as a prank tool.

Highlights
  • Frequency range 1Hz to 25,000Hz
  • Wave visualization
  • Adjustable sensitivity
  • Multiple waveforms (Sine, Square, Sawtooth, Triangle)
  • Custom frequency range
  • Logarithmic and Linear slider modes
Features
Read full description

Frequency Sound Generator is a very simply Frequency Generator. It can provide sound frequencies in range from 1Hz to 25,000Hz. To use Frequency Generator, you could swipe your finger up and down to raise or lower the frequency of the tones. The user interface is very simple and clear. You could adjust the frequency up or down exactly in 1Hz with arrow button, and directly check the frequency by professional wave visualization. The human can hear from 20Hz to 20,000HZ, and you can use Frequency Generator to test your hearing. Usage scenarias: 1. Use Frequency Generator to annoy dogs, cats or people. 2. Use this app as dog whistle to train your dog or other pets. 3. Stop your neighbour’s dog from barking by adjusting the sound frequency until it works. 4. Use this app to tease your classmates or friends as a prank tool. 5. Mosquito repellent. Frequency Generator is easy to allow you to generate tones range from 0Hz to Ultrasonic 25kHz frequency. 1. Frequency Slider Scale - Choose between Logarithmic and Linear adjustment modes for precise frequency control 2. Adjustable Sensitivity - Select High, Medium, or Low sensitivity to match your preference for slider responsiveness 3. Multiple Waveforms - Generate different sound types including Sine, Square, Sawtooth, and Triangle waves 4. Custom Frequency Range - Set your preferred frequency range from 1 Hz to 25,000 Hz for personalized sound generation 5. Enhanced Settings - Intuitive settings interface for easy customization of all tone generation parameters Subscription Information : Frequency Sound Generator App offers an auto-renewing yearly subscription at $19.99 USD/year and auto-renewing weekly subscription at $5.99 USD/week to provide you with unlimited access to all premium features while you maintain an active subscription. Payment will be charged to the payment method connected to your iTunes Account when you confirm the initial subscription purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period. Your account will be charged for renewal within 24-hours prior to the end of the current period. You may manage your subscription and auto-renewal may be turned off by going to your Account Settings after purchase. Terms of service: http://fireappspro.com/tone/frequency_terms_of_use.html Privacy policy: http://www.fireappspro.com/#portfolio Please get in touch if you have any problems via email.

Screenshots

Audio Function Generator4 screens
Frequency Sound Generator App4 screens

Verdict

The call

The clearest difference is monetization model: Audio Function Generator at free with in-app purchases against Frequency Sound Generator App's subscription. Audio Function Generator also leads on ads (none vs shown) and rating (4.7 vs 4.5). On price, ratings volume, update cadence and in-app purchases 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 and Frequency Sound Generator App sells 2 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Audio Function Generator holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 2.2K and 4.8K respectively. Written reviews point the same way: 77% of Audio Function Generator's written reviews are positive against 66% of Frequency Sound Generator App's.

UpkeepUpdate frequency

Audio Function Generator ships an update every 6 weeks, Frequency Sound Generator App every 2 months. Both last shipped on September 24, 2026.

Scorecard4 real differences · 6 level
Audio Function Generator versus Frequency Sound Generator App: the parameters behind the verdict, then further details
ParameterAudio Function GeneratorFrequency Sound Generator App
PriceFreeFree
Rating4.7 (2.2K ratings) — better4.5 (4.8K ratings)
Positive reviews77.1% of reviews — better66.3% of reviews
Number of ratings2.2K4.8K — better
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.515.0 — better
Further details — not scored
Size14 MB36 MB
Age rating4+4+
DeveloperThomas GruberMin Ku

Customer experience

Audio Function Generator

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

Frequency Sound Generator App

All ratings4,761 ratings
Positive87.0%
Neutral4.4%
Negative8.6%
Written reviews564 reviews
Positive66.3%
Neutral7.6%
Negative26.1%

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

Frequency Sound Generator App

From 4.8K App Store ratings

What we love

  • 👍 Helpful for tinnitus
  • 🚀 Accurate frequency generation
  • 🎉 Great for meditation and relaxation
  • 💡 Useful for testing speaker systems
  • 🔍 Ability to test hearing range

Room to improve

  • 🐛 Difficulty adjusting precise frequencies
  • 🔊 Extremely high frequencies can be painful
  • 🔋 Stops playing when screen is locked
  • 📢 Excessive ads
  • 🤔 Mosquito repellent feature not effective

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)

Frequency Sound Generator App

Reported bugs

3 issues
  • Frequency slider is overly sensitive
  • Displayed frequency doesn't match actual output
  • Inconsistent behavior between 'Play' and 'Mode' buttons

Requested features

4 requests
  • Option to save favorite frequencies
  • Ability to type in specific frequency values
  • Background playback support
  • Paid ad-free version

In-app purchases

1 purchases

Audio Function Generator

One-time1
  • Upgrade to PRO$9.99
2 purchases

Frequency Sound Generator App

Subscriptions2
  • Unlimited Access Weekly Plan$5.997 Days
  • Unlimited Access Yearly Plan$19.991 Year

Questions

Is Audio Function Generator free?
Audio Function Generator is free to download, with in-app purchases available.
Is Frequency Sound Generator App free?
Frequency Sound Generator App is free to download, with in-app purchases available.
Which has better reviews, Audio Function Generator or Frequency Sound Generator App?
Audio Function Generator is rated higher. Audio Function Generator averages 4.7 out of 5 from 2.2K ratings, while Frequency Sound Generator App averages 4.5 from 4.8K ratings.
Do Audio Function Generator or Frequency Sound Generator App have ads?
Frequency Sound Generator App shows ads; Audio Function Generator does not.
Which is updated more often, Audio Function Generator or Frequency Sound Generator App?
Audio Function Generator ships an update every 6 weeks, and Frequency Sound Generator App every 2 months. Most recently, Audio Function Generator was updated on September 24, 2026 and Frequency Sound Generator App on September 24, 2026.

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