# Frequency Sound Wave Generator vs PQS IoT

The clearest difference is in-app purchases: PQS IoT at none against Frequency Sound Wave Generator's 3. PQS IoT also leads on ads (none vs shown). Frequency Sound Wave Generator's advantage is update cadence (every 4 weeks vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Frequency Sound Wave Generator sells 3 in-app purchases, starting at $1.99 per month. PQS IoT asks for nothing beyond the download.

Frequency Sound Wave Generator ships an update every 4 weeks, PQS IoT every 2 months. The most recent releases landed on November 5, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Frequency Sound Wave Generator | PQS IoT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (99 ratings)](https://appshunter.io/ios/app/frequency-sound-wave-generator/id6478711398/reviews)** | — |
| Number of ratings | **99** | — |
| Positive reviews | 90.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 4 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 146 MB | 5 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [David Krejci](https://appshunter.io/developer/1737377675) | [Ban Bui](https://appshunter.io/developer/1471920355) |

## What reviewers say

### Frequency Sound Wave Generator

[App page](https://appshunter.io/ios/app/frequency-sound-wave-generator/id6478711398)

Generate and analyze sound waves with a comprehensive suite of tools. Create single or multiple tones, test speakers, tune instruments, and explore various sound effects. Play sounds in the background and export them as audio files.

**Highlights:** Single and multiple frequency generation, Musical note presets, Binaural beats and SFX generator, Sweep and noise generator, Bass/Subwoofer sound test, Metronome, Background sound playback

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly PRO subscription | $1.99 | per month |
| Yearly Pro Membership | $9.99 | per year |
| Lifetime PRO membership | $19.99 | one-time |


### PQS IoT

[App page](https://appshunter.io/ios/app/pqs-iot/id6744650902)

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

**In-app purchases:** none


## Frequently asked questions

### Is Frequency Sound Wave Generator free?

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

### Is PQS IoT free?

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

### Do Frequency Sound Wave Generator or PQS IoT have ads?

Frequency Sound Wave Generator shows ads; PQS IoT does not.

### Which is updated more often, Frequency Sound Wave Generator or PQS IoT?

Frequency Sound Wave Generator ships an update every 4 weeks, and PQS IoT every 2 months. Most recently, Frequency Sound Wave Generator was updated on November 5, 2026 and PQS IoT on October 28, 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.*