# Frequency Generator vs App Greta

The clearest difference is in-app purchases: App Greta at none against Frequency Generator's 4. App Greta also leads on ads (none vs shown) and device support (3 vs 1). On price and update cadence there is nothing between them.

Both are free to download. Frequency Generator sells 4 in-app purchases, starting at $4.99 per 7 days. App Greta asks for nothing beyond the download.

Frequency Generator ships an update every 2 months, App Greta monthly. The most recent releases landed on July 8, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Frequency Generator | App Greta |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (16 ratings)](https://appshunter.io/ios/app/frequency-generator-hz-waves/id6544802995/reviews)** | — |
| Number of ratings | **16** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 25 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ORIOL NADAL SERRA](https://appshunter.io/developer/1678978095) | [Leistung Plus SA](https://appshunter.io/developer/1789420589) |

## What reviewers say

### Frequency Generator

[App page](https://appshunter.io/ios/app/frequency-generator-hz-waves/id6544802995)

This audio toolkit generates tones for testing and tuning, checks speaker performance for distortion, and uses sound waves to clean water and debris from speakers. It offers precise frequency control and high-fidelity sound output for various audio needs.

**Highlights:** Tone generator (20-20,000 Hz), Speaker testing for distortion, Water eject mode for speaker cleaning, Precise frequency control, High-quality sound output

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $4.99 | per 7 days |
| Monthly Premium | $4.99 | per month |
| Yearly Premium | $39.99 | per year |
| Premium For Life | $14.99 | one-time |


### App Greta

[App page](https://appshunter.io/ios/app/app-greta/id6740294374)

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

**In-app purchases:** none


## Frequently asked questions

### Is Frequency Generator free?

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

### Is App Greta free?

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

### Do Frequency Generator or App Greta have ads?

Frequency Generator shows ads; App Greta does not.

### Which is updated more often, Frequency Generator or App Greta?

Frequency Generator ships an update every 2 months, and App Greta monthly. Most recently, Frequency Generator was updated on July 8, 2026 and App Greta on September 14, 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.*