# Audio Function Generator PRO vs Multiple Tone Generator

The clearest difference is price: Multiple Tone Generator at Free against Audio Function Generator PRO's $9.99. Audio Function Generator PRO's advantage is in-app purchases (none vs 2) and ads (none vs shown). On rating, review sentiment, device support and iOS requirement there is nothing between them.

Multiple Tone Generator is free to download; Audio Function Generator PRO costs $9.99 up front. Multiple Tone Generator sells 2 one-off in-app purchases. Audio Function Generator PRO asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for Audio Function Generator PRO against 4.8 for Multiple Tone Generator. Both are backed by a comparable volume of ratings — 269 and 65 respectively. Written reviews split almost evenly too, at 88% and 88% positive.

Audio Function Generator PRO ships an update every 6 weeks, Multiple Tone Generator every 3 months. The most recent releases landed on September 30, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Audio Function Generator PRO | Multiple Tone Generator |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [4.8 (269 ratings)](https://appshunter.io/ios/app/audio-function-generator-pro/id895074703/reviews) | [4.8 (65 ratings)](https://appshunter.io/ios/app/multiple-tone-generator/id954158579/reviews) |
| Number of ratings | **269** | 65 |
| Positive reviews | **87.9% of reviews** | 87.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 13 MB | 4 MB |
| Requires iOS | **15.5** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Gruber](https://appshunter.io/developer/342699861) | [Loop-Sessions.LLC.](https://appshunter.io/developer/414215366) |

## What reviewers say

### Audio Function Generator PRO

[App page](https://appshunter.io/ios/app/audio-function-generator-pro/id895074703)

Generate various audio test tones, including sine, square, and sawtooth waves. Explore frequency and volume sweeps, custom presets, and different types of noise. Advanced settings allow for fine-tuning signal parameters and creating complex multi-tone sequences.

**Highlights:** Generate sine, square, triangular, and sawtooth tones, Frequency and volume sweep generation, Customizable presets and configurations, Multiple noise types (White, Pink, Violet, etc.), Advanced signal parameter control, Multi-tone and dual function generation

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- ✨ Superb craftsmanship and work
- 🚀 Excellent performance on older devices
- 💡 History feature is a great addition
- 👍 Versatile and powerful app
- 🎶 Great for binaural beats and sound creation

**What reviewers complain about**

- 📉 Linear sweep is useless
- ❓ Missing PWM functionality
- ❓ Missing Terzrauschen (third-octave noise)
- 🐛 Volume button issues
- 🐛 GUI is bad

**Reported bugs**

- Volume button issues (jumps up and down, displays wrong level)
- Update crashes on iPad Air2 when changing screens
- App opens AppStore repeatedly after purchase
- Buttons don't respond, settings don't keep
- Frequencies stick, program is useless

**Requested features**

- Logarithmic sweeps and frequency slider scale
- PWM functionality
- Terzrauschen (third-octave noise)
- Ping-pong sweeps in Multitone windows
- Sweeping of noise/adding noise in Multitone sweep with sweeping bandpass filter


### Multiple Tone Generator

[App page](https://appshunter.io/ios/app/multiple-tone-generator/id954158579)

Generate multiple audio signals with adjustable waveforms, frequencies, and volumes for each channel. Offers presets for guitar and bass tuning, with options to expand channel support.

**Highlights:** Multiple audio channels, Adjustable waveforms (Sine, Triangle, Squire, Saw), Precise frequency control (20Hz - 20000Hz), Individual channel volume and mute, Logarithmic frequency sliders, Guitar and bass tuning presets

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Increase channels from 6 to 16 | $1.99 | one-time |
| Always remove banner ads. | $4.99 | one-time |


## Frequently asked questions

### Is Audio Function Generator PRO free?

Audio Function Generator PRO costs $9.99, with no in-app purchases.

### Is Multiple Tone Generator free?

Multiple Tone Generator is free to download, with in-app purchases available.

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

Audio Function Generator PRO and Multiple Tone Generator are both rated 4.8 out of 5 on the App Store, from 269 and 65 ratings respectively.

### Do Audio Function Generator PRO or Multiple Tone Generator have ads?

Multiple Tone Generator shows ads; Audio Function Generator PRO does not.

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

Audio Function Generator PRO ships an update every 6 weeks, and Multiple Tone Generator every 3 months. Most recently, Audio Function Generator PRO was updated on September 30, 2026 and Multiple Tone Generator on September 23, 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.*