Comparison

Audio Function Generator vs Granula Synth

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

Granula Synth

Explore new soundscapes by manipulating granular audio. This app offers a library of presets, custom sound import, and extensive parameter adjustments for unique music creation. Save your settings and share your sonic experiments.

Highlights
  • Granular sound manipulation
  • Preset library
  • Custom sound import
  • Parameter adjustment
  • Save user settings
  • Share audio recordings
Features
Read full description

Push the boundaries of sound design. Granula Synth turns granular synthesis into a playground — grab tiny grains of audio, scatter them across the waveform, and shape them into pads, textures, and soundscapes no other synth can make. What's inside: - Curated preset library, crafted by sound designers - Deep grain controls — length, position, direction, pitch, and more - Powerful modulation matrix with dual LFOs and chaos generators - Built-in envelope, EQ, and FX chain - Import your own audio or record directly in the app - Save, organize, and share your presets - Export your ideas straight to your DAW Whether you're scoring film, building ambient textures, or just exploring new sonic territory, Granula Synth gives you granular control over every grain of sound. Privacy Policy: https://sites.google.com/view/castles-trip-privacy-policy Terms of Use: https://sites.google.com/view/granula-tos

Screenshots

Audio Function Generator4 screens
Granula Synth4 screens

Verdict

The call

The clearest difference is review sentiment: Audio Function Generator at 77% against Granula Synth's 20%. Audio Function Generator also leads on rating (4.7 vs 1.8) and update cadence (every 6 weeks vs every 25 months). Granula Synth's advantage is 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 Granula Synth sells 3 in-app purchases, starting at $2.99 per month. 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 1.8. That said, the two scores are not equally well evidenced: Audio Function Generator has 2.2K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 77% of Audio Function Generator's written reviews are positive against 20% of Granula Synth's.

UpkeepUpdate frequency

Audio Function Generator ships an update every 6 weeks, Granula Synth every 25 months. The most recent releases landed on September 24, 2026 and July 10, 2026 respectively.

Scorecard5 real differences · 5 level
Audio Function Generator versus Granula Synth: the parameters behind the verdict, then further details
ParameterAudio Function GeneratorGranula Synth
PriceFreeFree
Rating4.7 (2.2K ratings) — better1.8 (4 ratings)
Positive reviews77.1% of reviews — better20.0% of reviews
Number of ratings2.2K — better4
Update frequencyEvery 6 weeks — betterEvery 25 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.512.0 — better
Further details — not scored
Size14 MB75 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%

Granula Synth

All ratings4 ratings
Positive25.0%
Neutral0.0%
Negative75.0%
Written reviews5 reviews
Positive20.0%
Neutral20.0%
Negative60.0%

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)

Granula Synth

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

Granula Synth

Subscriptions3
  • Access to app features3 Days trial$2.991 Month
  • Access to app features3 Days trial$7.493 Months
  • Access to app features3 Days trial$8.996 Months

Questions

Is Audio Function Generator free?
Audio Function Generator is free to download, with in-app purchases available.
Is Granula Synth free?
Granula Synth is free to download, with in-app purchases available.
Which has better reviews, Audio Function Generator or Granula Synth?
Audio Function Generator is rated higher. Audio Function Generator averages 4.7 out of 5 from 2.2K ratings, while Granula Synth averages 1.8 from 4 ratings.
Do Audio Function Generator or Granula Synth have ads?
Neither Audio Function Generator nor Granula Synth shows ads.
Which is updated more often, Audio Function Generator or Granula Synth?
Audio Function Generator ships an update every 6 weeks, and Granula Synth every 25 months. Most recently, Audio Function Generator was updated on September 24, 2026 and Granula Synth on July 10, 2026.

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