# Guitar Tuner vs Audio Function Generator

The clearest difference is in-app purchases: Guitar Tuner at none against Audio Function Generator's 1. Audio Function Generator's advantage is ads (none vs shown) and update cadence (every 6 weeks vs every 9 months). On price, rating, review sentiment and ratings volume there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.6 for Guitar Tuner against 4.7 for Audio Function Generator. Both are backed by a comparable volume of ratings — 3.9K and 2.2K respectively. Written reviews are what separate them: 73% of Guitar Tuner's written reviews are positive against 77% of Audio Function Generator's.

Guitar Tuner ships an update every 9 months, Audio Function Generator every 6 weeks. The most recent releases landed on October 20, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Guitar Tuner | Audio Function Generator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (3.9K ratings)](https://appshunter.io/ios/app/guitar-tuner/id310457191/reviews) | **[4.7 (2.2K ratings)](https://appshunter.io/ios/app/audio-function-generator/id768229610/reviews)** |
| Number of ratings | **3.9K** | 2.2K |
| Positive reviews | 73.0% of reviews | **77.2% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 6 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 9 MB | 13 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alvin Yu](https://appshunter.io/developer/310457194) | [Thomas Gruber](https://appshunter.io/developer/342699861) |

## What reviewers say

### Guitar Tuner

[App page](https://appshunter.io/ios/app/guitar-tuner/id310457191)

Tune your 6-string guitar with precise reference notes. Supports standard tuning and more. Ensure your device is not on silent to hear the tuning tones.

**Highlights:** Accurate reference notes, Supports standard tuning (E A D G B e), Supports more tunings, Clear tuning tones, Device not on silent required

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Guitar Tuner free?

Guitar Tuner is free to download, with no in-app purchases.

### Is Audio Function Generator free?

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

### Which has better reviews, Guitar Tuner or Audio Function Generator?

Audio Function Generator is rated higher. Guitar Tuner averages 4.6 out of 5 from 3.9K ratings, while Audio Function Generator averages 4.7 from 2.2K ratings.

### Do Guitar Tuner or Audio Function Generator have ads?

Guitar Tuner shows ads; Audio Function Generator does not.

### Which is updated more often, Guitar Tuner or Audio Function Generator?

Guitar Tuner ships an update every 9 months, and Audio Function Generator every 6 weeks. Most recently, Guitar Tuner was updated on October 20, 2026 and Audio Function Generator on October 21, 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.*