# Audio Function Generator vs Flat Earth Sun, Moon & Zodiac

The clearest difference is price: Audio Function Generator at Free against Flat Earth Sun, Moon & Zodiac's $5.99. Flat Earth Sun, Moon & Zodiac's advantage is chart position (#41 vs unranked). On rating, review sentiment, ratings volume and update cadence there is nothing between them.

Audio Function Generator is free to download; Flat Earth Sun, Moon & Zodiac costs $5.99 up front. Audio Function Generator sells 1 one-off in-app purchase and Flat Earth Sun, Moon & Zodiac sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for Audio Function Generator against 4.7 for Flat Earth Sun, Moon & Zodiac. Both are backed by a comparable volume of ratings — 2.2K and 2.2K respectively. Written reviews are what separate them: 77% of Audio Function Generator's written reviews are positive against 74% of Flat Earth Sun, Moon & Zodiac's.

Audio Function Generator ships an update every 6 weeks, Flat Earth Sun, Moon & Zodiac every 4 weeks. Both last shipped on October 29, 2026.

## The numbers

| Metric | Audio Function Generator | Flat Earth Sun, Moon & Zodiac |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Rating | [4.7 (2.2K ratings)](https://appshunter.io/ios/app/audio-function-generator/id768229610/reviews) | **[4.7 (2.2K ratings)](https://appshunter.io/ios/app/flat-earth-sun-moon-and-zodiac/id1440996640/reviews)** |
| Number of ratings | 2.2K | **2.2K** |
| Positive reviews | **77.2% of reviews** | 74.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | — | **#41** |
| Size | 13 MB | 311 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Thomas Gruber](https://appshunter.io/developer/342699861) | [Blue Water Bay](https://appshunter.io/developer/1440996639) |

## 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


### Flat Earth Sun, Moon & Zodiac

[App page](https://appshunter.io/ios/app/flat-earth-sun-moon-and-zodiac/id1440996640)

**Currently charting:** #41 Top Paid · Utilities (US App Store)

Explore celestial mechanics from an alternative perspective, tracking the sun and moon's positions on an AE map. Connect with like-minded users, access educational content, and discover flat earth-related books and products. Features include time-lapse views, a world compass, and local weather data.

**Highlights:** Sun and moon position tracking on AE map, Daily educational video content, Connect with users worldwide, Zodiac Star Wheel for astrological cycles, Flat earth-related books and products, Time-lapse of sun and moon movements, World Compass visualization

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscriptions | $0.99 | per month |
| Yearly Subscriptions | $10.99 | per year |

**What reviewers like**

- 🚀 Highly informative
- 🌐 Provides a visual representation of the flat earth model
- 📚 Extensive video library with censored content
- 👍 Useful for explaining flat earth concepts
- 🙏 Helps users find the truth

**What reviewers complain about**

- 🐛 Frequent crashes and bugs
- 🔒 Security concerns with data leaks and privacy issues
- 💰 Subscription model with hidden costs
- 🤔 Questionable accuracy of the flat earth model
- 🤯 Promotes conspiracy theories and pseudoscience

**Reported bugs**

- Clock not displaying the correct time
- Subscription issues and inability to access paid features
- Compatibility problems with newer iOS devices
- Frequent app crashes and freezes

**Requested features**

- Ability to use the clock as a home screen or wallpaper
- Improved compass functionality
- Portrait mode support
- Constellation map integration
- Ability to track sun/moon positions more accurately


## Frequently asked questions

### Is Audio Function Generator free?

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

### Is Flat Earth Sun, Moon & Zodiac free?

Flat Earth Sun, Moon & Zodiac costs $5.99, and also offers in-app purchases.

### Which has better reviews, Audio Function Generator or Flat Earth Sun, Moon & Zodiac?

Flat Earth Sun, Moon & Zodiac is rated higher. Audio Function Generator averages 4.7 out of 5 from 2.2K ratings, while Flat Earth Sun, Moon & Zodiac averages 4.7 from 2.2K ratings.

### Do Audio Function Generator or Flat Earth Sun, Moon & Zodiac have ads?

Neither Audio Function Generator nor Flat Earth Sun, Moon & Zodiac shows ads.

### Which is updated more often, Audio Function Generator or Flat Earth Sun, Moon & Zodiac?

Audio Function Generator ships an update every 6 weeks, and Flat Earth Sun, Moon & Zodiac every 4 weeks. Most recently, Audio Function Generator was updated on October 29, 2026 and Flat Earth Sun, Moon & Zodiac on October 29, 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.*