# Audio Function Generator vs Tone Generator EX

The clearest difference is in-app purchases: Tone Generator EX at none against Audio Function Generator's 1. Tone Generator EX also leads on update cadence (every 9 days vs every 6 weeks) and review sentiment (91% vs 77%). Audio Function Generator's advantage is ads (none vs shown) and ratings volume (2.2K vs 439). On price, rating and device support there is nothing between them.

Both are free to download. Audio Function Generator sells 1 one-off in-app purchase. Tone Generator EX asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Audio Function Generator against 4.8 for Tone Generator EX. Both are backed by a comparable volume of ratings — 2.2K and 439 respectively. Written reviews are what separate them: 77% of Audio Function Generator's written reviews are positive against 91% of Tone Generator EX's.

Audio Function Generator ships an update every 6 weeks, Tone Generator EX every 9 days. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Audio Function Generator | Tone Generator EX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (2.2K ratings)](https://appshunter.io/ios/app/audio-function-generator/id768229610/reviews) | **[4.8 (439 ratings)](https://appshunter.io/ios/app/tone-generator-ex/id1462601423/reviews)** |
| Number of ratings | **2.2K** | 439 |
| Positive reviews | 77.1% of reviews | **90.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 14 MB | 29 MB |
| Requires iOS | 15.5 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Gruber](https://appshunter.io/developer/342699861) | [An-Che Lee](https://appshunter.io/developer/1314851569) |

## What reviewers say

### Audio Function Generator

[App page](https://appshunter.io/ios/app/audio-function-generator/id768229610)

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:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to PRO | $9.99 | one-time |

**What reviewers like**

- 👍 Great app
- 🎶 Helps with Tinnitus
- 💯 Best app I've paid for
- 🔍 Highly recommended
- 🎨 Attention to detail

**What reviewers complain about**

- 🐛 Crashes
- 💰 Deceptive/Money hungry
- 🔒 Basic features paywalled
- 🔒 Limited without paying
- 🔒 Removed functionality to push paid version

**Reported bugs**

- Crashes on launch
- Volume slider issues
- Airplay not working
- Sound distortion when display is active

**Requested features**

- 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


### Tone Generator EX

[App page](https://appshunter.io/ios/app/tone-generator-ex/id1462601423)

Generate a wide range of audio tones with adjustable frequencies and waveforms. Control playback in the background, from your notification drawer, or lock screen. The app automatically pauses for calls and alarms, and allows you to save custom presets.

**Highlights:** Frequency range 15Hz to 22KHz, Sine, Square, Sawtooth, Triangle waveforms, Auto-off timer, Background playback, Notification drawer control, Create custom presets, Set frequency by music note

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Clean, intuitive, and elegant interface design
- 🎵 Precise frequency control with decimal accuracy
- 💰 Completely free with no ads or subscriptions
- ⚙️ Customizable A440 tuning standard adjustment
- 💾 Preset saving and loading functionality

**What reviewers complain about**

- 📉 Limited frequency range (minimum 15Hz, maximum needs extension)
- 🚫 No direct frequency input via typing
- ⏸️ No export functionality for generated tones
- 🔇 Clicking sounds during frequency adjustments
- 📱 No stereo output capability

**Reported bugs**

- App crashes and won't play after initial use
- Requires unnecessary credit card information
- Potential compatibility issues with newer iOS versions

**Requested features**

- Extend frequency range to 10Hz or lower (0-12Hz requested)
- Extend upper frequency range to support .4-12Hz adjustments
- Direct frequency input by typing instead of dial adjustment
- VST3/AUv3/desktop plugin version for DAW integration
- Frequency sweep functionality with adjustable speed


## Frequently asked questions

### Is Audio Function Generator free?

Audio Function Generator is free to download, with in-app purchases available.

### Is Tone Generator EX free?

Tone Generator EX is free to download, with no in-app purchases.

### Which has better reviews, Audio Function Generator or Tone Generator EX?

Tone Generator EX is rated higher. Audio Function Generator averages 4.7 out of 5 from 2.2K ratings, while Tone Generator EX averages 4.8 from 439 ratings.

### Do Audio Function Generator or Tone Generator EX have ads?

Tone Generator EX shows ads; Audio Function Generator does not.

### Which is updated more often, Audio Function Generator or Tone Generator EX?

Audio Function Generator ships an update every 6 weeks, and Tone Generator EX every 9 days. Most recently, Audio Function Generator was updated on October 10, 2026 and Tone Generator EX on October 6, 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.*