Audio Function Generator vs Granular Synthesizer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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)
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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
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.
- Granular sound library
- Pre-made tracks
- Adjustable sound parameters
- Import from iTunes
- Record and share functionality
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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
Verdict
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
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.
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.
| Parameter | Audio Function Generator | Granular Synthesizer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (2.2K ratings) — better | — |
| Positive reviews | 77.1% of reviews — better | 16.7% of reviews |
| Number of ratings | 2.2K — better | — |
| Update frequency | Every 6 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.5 | 12.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 73 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Gruber | Stanislav Duplinskiy |
Customer experience
Audio Function Generator
Granular Synthesizer
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
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- Improve accessibility (VoiceOver support)
Granular Synthesizer
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Audio Function Generator
- Upgrade to PRO$9.99
Granular Synthesizer
- Sound recording$8.99
- All loops$12.99
- Full pack$14.99
Questions
Is Audio Function Generator free?
Is Granular Synthesizer free?
Do Audio Function Generator or Granular Synthesizer have ads?
Which is updated more often, Audio Function Generator or Granular Synthesizer?
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