Comparison

Tone generator vs Audio Function Generator

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

Head to head
About

Tone generator

Create various periodic signals with adjustable frequency and amplitude for testing electronic circuits or tuning instruments. Features include a metronome, a real-time tuner, and options for generating different noise types and tone sequences. It also offers unique features for hearing tests and party games.

Highlights
  • Generate periodic signals
  • Adjustable frequency and amplitude
  • Integrated instrument tuner
  • Metronome for practice
  • Hearing ability tests
  • Generate white/pink noise
  • Create tone sequences
Features
Read full description

Generate various periodic signals with different waveforms with adjustable frequency and amplitude. These are used to test electronic circuits such as amplifiers and filters. Also suitable for musicians to tune their instruments. As soon as a note sounds, the integrated tuner recognizes the pitch and displays the note name and deviation. For any instrument that produces an even tone. A metronome also helps you to practise. Drive insects away or compare your hearing ability with your friends and relatives and share your results! Or watch others straining their ears to find the sounds that cannot locate you. Party fun is guaranteed! optional features (Purchase): - free of Ads - manual frequency input - support app functionality for connected Bluetooth devices, e.g. speaker - different signals - white/pink noise - tuner for tuning instruments (real-time tone recognition C1-C8) with tuning whistle - metronome for a steady tempo - note/tone for frequency - Left/right channel, stereo - create a tone sequence for playing several different frequencies in particular time slot - loop for tone sequence - save and delete tone sequences - load saved tone sequences - send your tone sequence as an audio file (.caf format) - option to compress audio files Attention: If you want to share your results with others, first test your audible frequencies, then mark under the speakers your lowest audible tone and your highest audible tone (stored only temporarily). A small hint: the chart will show you what other frequencies of your age are still possible to reach.

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

Screenshots

Tone generator4 screens
Audio Function Generator4 screens

Verdict

The call

The clearest difference is rating: Audio Function Generator at 4.7 against Tone generator's 4.0. Audio Function Generator also leads on ads (none vs shown) and update cadence (every 6 weeks vs every 5 months). Tone generator's advantage is iOS requirement (12.0 vs 15.5). On price, in-app purchases, monetization model and device support 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. Tone generator sells 3 one-off in-app purchases and Audio Function Generator sells 1 one-off in-app purchase. 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 4.0. That said, the two scores are not equally well evidenced: Audio Function Generator has 2.2K ratings behind it against 152, so its average is the more settled of the two. Written reviews point the same way: 67% of Tone generator's written reviews are positive against 77% of Audio Function Generator's.

UpkeepUpdate frequency

Tone generator ships an update every 5 months, Audio Function Generator every 6 weeks. The most recent releases landed on September 17, 2026 and September 24, 2026 respectively.

Scorecard6 real differences · 4 level
Tone generator versus Audio Function Generator: the parameters behind the verdict, then further details
ParameterTone generatorAudio Function Generator
PriceFreeFree
Rating4.0 (152 ratings)4.7 (2.2K ratings) — better
Positive reviews67.1% of reviews77.1% of reviews — better
Number of ratings1522.2K — better
Update frequencyEvery 5 monthsEvery 6 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.5
Further details — not scored
Size27 MB14 MB
Age rating4+4+
Developermichael heinzThomas Gruber

Customer experience

Tone generator

All ratings152 ratings
Positive75.7%
Neutral4.6%
Negative19.7%
Written reviews237 reviews
Positive67.1%
Neutral3.8%
Negative29.1%

Audio Function Generator

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

User reviews

Tone generator

From 152 App Store ratings

What we love

  • 🚀 Works every time!
  • 🚀 Awesome application for generating tones and studying sound
  • 👍 Very useful
  • 👍 Genius
  • 👍 Great app to make your tones

Room to improve

  • 🐛 Doesn't go lower than 10hz
  • 🔍 Ruined by ads
  • 🔍 Way too many ads
  • 🔍 Crashes before I can export even though I paid for the feature
  • 🔍 Fake app. Buying the upgrade doesn't do anything. There is no support. You can't export like it says you can. It's a scam.

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

Bugs and requests

Tone generator

Reported bugs

10 issues
  • Doesn't go lower than 10hz
  • Crashes before I can export even though I paid for the feature
  • Fake app. Buying the upgrade doesn't do anything. There is no support. You can't export like it says you can. It's a scam.
  • app is modified
  • No tone
Show 5 more
  • Frozen on my iPad
  • Doesn't produce any sound
  • No sound
  • Faulty
  • No sound

Requested features

7 requests
  • Wish I had a manual that explains a couple functions
  • More precise way to select the frequency
  • Playing of multiple tomes
  • Manually enter a frequency
  • More than one voice
Show 2 more
  • Dark mode option
  • Advanced analytics dashboard

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)

In-app purchases

3 purchases

Tone generator

One-time3
  • Extra-Feature 1$1.99
  • No advertising$1.99
  • Upgrade to full version$3.99
1 purchases

Audio Function Generator

One-time1
  • Upgrade to PRO$9.99

Questions

Is Tone generator free?
Tone generator is free to download, with in-app purchases available.
Is Audio Function Generator free?
Audio Function Generator is free to download, with in-app purchases available.
Which has better reviews, Tone generator or Audio Function Generator?
Audio Function Generator is rated higher. Tone generator averages 4.0 out of 5 from 152 ratings, while Audio Function Generator averages 4.7 from 2.2K ratings.
Do Tone generator or Audio Function Generator have ads?
Tone generator shows ads; Audio Function Generator does not.
Which is updated more often, Tone generator or Audio Function Generator?
Tone generator ships an update every 5 months, and Audio Function Generator every 6 weeks. Most recently, Tone generator was updated on September 17, 2026 and Audio Function Generator on September 24, 2026.

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