# Audio Function Generator vs SereniBrain

The clearest difference is in-app purchases: SereniBrain at none against Audio Function Generator's 1. SereniBrain also leads on review sentiment (100% vs 77%). Audio Function Generator's advantage is ratings volume (2.2K vs 13). On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.7 for Audio Function Generator against 4.7 for SereniBrain. That said, the two scores are not equally well evidenced: Audio Function Generator has 2.2K ratings behind it against 13, so its average is the more settled of the two. Written reviews are what separate them: 77% of Audio Function Generator's written reviews are positive against 100% of SereniBrain's.

Audio Function Generator ships an update every 6 weeks, SereniBrain every 4 weeks. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Audio Function Generator | SereniBrain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (2.2K ratings)](https://appshunter.io/ios/app/audio-function-generator/id768229610/reviews) | [4.7 (13 ratings)](https://appshunter.io/ios/app/serenibrain/id6479871875/reviews) |
| Number of ratings | **2.2K** | 13 |
| Positive reviews | 77.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 14 MB | 341 MB |
| Requires iOS | 15.5 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Thomas Gruber](https://appshunter.io/developer/342699861) | [华南脑控(广东)智能科技有限公司](https://appshunter.io/developer/1728613747) |

## 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


### SereniBrain

[App page](https://appshunter.io/ios/app/serenibrain/id6479871875)

This tool uses brain-computer interface technology to guide users through meditation scenarios. It helps individuals learn meditation techniques to achieve relaxation for both body and mind. The app provides assessments, real-time feedback, and detailed analysis reports.

**Highlights:** Meditation State Assessment, Real-time Neural Feedback, Meditation Analysis Reports, Premium Practice Content

**Features:** 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 SereniBrain free?

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

### Which has better reviews, Audio Function Generator or SereniBrain?

Audio Function Generator and SereniBrain are both rated 4.7 out of 5 on the App Store, from 2.2K and 13 ratings respectively.

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

Neither Audio Function Generator nor SereniBrain shows ads.

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

Audio Function Generator ships an update every 6 weeks, and SereniBrain every 4 weeks. Most recently, Audio Function Generator was updated on October 10, 2026 and SereniBrain 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.*