Comparison

Audio Function Generator vs Granular Synthesizer

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

Granular Synthesizer

Create unique sounds by manipulating audio granules. This app offers a library of granules, pre-made tracks, and adjustable sound parameters. You can also import your own music and share your creations.

Highlights
  • Granular sound library
  • Pre-made tracks
  • Adjustable sound parameters
  • Import from iTunes
  • Record and share functionality
Features
Read full description

Expand your boundaries in music making! Experiment with sound using granules - move them around the track, adjust settings and get a new sound. What does the app offer? - A great sound granules library for you to try; - A set of ready-made tracks; - Sound parameters to change and adjust the sounding; - Possibility to add your tracks from iTunes; - Record & share feature.

Screenshots

Audio Function Generator4 screens
Granular Synthesizer3 screens

Verdict

The call

The clearest difference is review sentiment: Audio Function Generator at 77% against Granular Synthesizer's 17%. Granular Synthesizer's advantage is update cadence (every 3 weeks vs every 6 weeks) and iOS requirement (12.0 vs 15.5). On price, ads, in-app purchases and monetization model 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 Granular Synthesizer sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Audio Function Generator ships an update every 6 weeks, Granular Synthesizer every 3 weeks. The most recent releases landed on September 24, 2026 and July 7, 2026 respectively.

Scorecard3 real differences · 7 level
Audio Function Generator versus Granular Synthesizer: the parameters behind the verdict, then further details
ParameterAudio Function GeneratorGranular Synthesizer
PriceFreeFree
Rating4.7 (2.2K ratings) — better—
Positive reviews77.1% of reviews — better16.7% of reviews
Number of ratings2.2K — better—
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.512.0 — better
Further details — not scored
Size14 MB73 MB
Age rating4+4+
DeveloperThomas GruberStanislav Duplinskiy

Customer experience

Audio Function Generator

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

Granular Synthesizer

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews6 reviews
Positive16.7%
Neutral33.3%
Negative50.0%

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)

Granular Synthesizer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Audio Function Generator

One-time1
  • Upgrade to PRO$9.99
3 purchases

Granular Synthesizer

One-time3
  • Sound recording$8.99
  • All loops$12.99
  • Full pack$14.99

Questions

Is Audio Function Generator free?
Audio Function Generator is free to download, with in-app purchases available.
Is Granular Synthesizer free?
Granular Synthesizer is free to download, with in-app purchases available.
Do Audio Function Generator or Granular Synthesizer have ads?
Neither Audio Function Generator nor Granular Synthesizer shows ads.
Which is updated more often, Audio Function Generator or Granular Synthesizer?
Audio Function Generator ships an update every 6 weeks, and Granular Synthesizer every 3 weeks. Most recently, Audio Function Generator was updated on September 24, 2026 and Granular Synthesizer on July 7, 2026.

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