# Tone generator vs Granula Synth

The clearest difference is review sentiment: Tone generator at 67% against Granula Synth's 20%. Tone generator also leads on rating (4.0 vs 1.8) and update cadence (every 5 months vs every 25 months). Granula Synth's advantage is ads (none vs shown). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Tone generator sells 3 one-off in-app purchases 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.

Tone generator holds the better App Store score, 4.0 against 1.8. That said, the two scores are not equally well evidenced: Tone generator has 152 ratings behind it against 4, 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 20% of Granula Synth's.

Tone generator ships an update every 5 months, Granula Synth every 25 months. The most recent releases landed on September 17, 2026 and July 10, 2026 respectively.

## The numbers

| Metric | Tone generator | Granula Synth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (152 ratings)](https://appshunter.io/ios/app/tone-generator/id457003837/reviews)** | [1.8 (4 ratings)](https://appshunter.io/ios/app/granula-synth/id1624549704/reviews) |
| Number of ratings | **152** | 4 |
| Positive reviews | **67.1% of reviews** | 20.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 months** | Every 25 months |
| Monetization | Free with in-app purchases | Freemium |
| Size | 27 MB | 75 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [michael heinz](https://appshunter.io/developer/292745639) | [Stanislav Duplinskiy](https://appshunter.io/developer/1529735040) |

## What reviewers say

### Tone generator

[App page](https://appshunter.io/ios/app/tone-generator/id457003837)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extra-Feature 1 | $1.99 | one-time |
| No advertising | $1.99 | one-time |
| Upgrade to full version | $3.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

- 🐛 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.

**Reported bugs**

- 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

**Requested features**

- 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


### Granula Synth

[App page](https://appshunter.io/ios/app/granula-synth/id1624549704)

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:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Access to app features | $2.99 | per month |
| Access to app features | $7.49 | per 3 months |
| Access to app features | $8.99 | per 6 months |


## Frequently asked questions

### Is Tone generator free?

Tone 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, Tone generator or Granula Synth?

Tone generator is rated higher. Tone generator averages 4.0 out of 5 from 152 ratings, while Granula Synth averages 1.8 from 4 ratings.

### Do Tone generator or Granula Synth have ads?

Tone generator shows ads; Granula Synth does not.

### Which is updated more often, Tone generator or Granula Synth?

Tone generator ships an update every 5 months, and Granula Synth every 25 months. Most recently, Tone generator was updated on September 17, 2026 and Granula Synth on July 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*