# Audio Function Generator vs Sino

The clearest difference is price: Audio Function Generator at Free against Sino's $0.99. Audio Function Generator also leads on update cadence (every 6 weeks vs every 38 months). Sino's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

Audio Function Generator is free to download; Sino costs $0.99 up front. Audio Function Generator sells 1 one-off in-app purchase. Sino asks for nothing beyond the download.

Audio Function Generator ships an update every 6 weeks, Sino every 38 months. The most recent releases landed on October 10, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Audio Function Generator | Sino |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.7 (2.2K ratings)](https://appshunter.io/ios/app/audio-function-generator/id768229610/reviews)** | — |
| Number of ratings | **2.2K** | — |
| Positive reviews | 77.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 38 months |
| Monetization | Free with in-app purchases | — |
| Size | 14 MB | 4 MB |
| Requires iOS | 15.5 | **14.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Gruber](https://appshunter.io/developer/342699861) | [Benjamin Graf](https://appshunter.io/developer/1545255558) |

## 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


### Sino

[App page](https://appshunter.io/ios/app/sino/id1545255556)

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

**In-app purchases:** none


## Frequently asked questions

### Is Audio Function Generator free?

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

### Is Sino free?

Sino costs $0.99, with no in-app purchases.

### Do Audio Function Generator or Sino have ads?

Neither Audio Function Generator nor Sino shows ads.

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

Audio Function Generator ships an update every 6 weeks, and Sino every 38 months. Most recently, Audio Function Generator was updated on October 10, 2026 and Sino on October 1, 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.*