# Campos Electromagnéticos (CEM) vs Frequency Sound Wave Generator

The clearest difference is in-app purchases: Campos Electromagnéticos (CEM) at none against Frequency Sound Wave Generator's 3. Campos Electromagnéticos (CEM) also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.0). Frequency Sound Wave Generator's advantage is update cadence (monthly vs every 16 months). On price and device support 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. Campos Electromagnéticos (CEM) asks for nothing beyond the download.

Campos Electromagnéticos (CEM) ships an update every 16 months, Frequency Sound Wave Generator monthly. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Campos Electromagnéticos (CEM) | Frequency Sound Wave Generator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (94 ratings)](https://appshunter.io/ios/app/frequency-sound-wave-generator/id6478711398/reviews)** |
| Number of ratings | — | **94** |
| Positive reviews | — | 90.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 16 months | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 27 MB | 169 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Instituto Nacional de Seguridad e Higiene en el Trabajo](https://appshunter.io/developer/1019192741) | [David Krejci](https://appshunter.io/developer/1737377675) |

## What reviewers say

### Campos Electromagnéticos (CEM)

[App page](https://appshunter.io/ios/app/campos-electromagneticos-cem/id1521220922)

**Features:** macOS Compatibility

**In-app purchases:** none


### Frequency Sound Wave Generator

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

Generate and analyze a wide range of sounds and frequencies. Explore tone generation, sound tests, musical tuning, and create custom sound effects. Visualize sound waves and experiment with different waveforms.

**Highlights:** Single and multiple frequency generation, Musical notes presets, Binaural beats, SFX sound generator, Sweep generator, Bass/Subwoofer sound test, DTMF tones

**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 |


## Frequently asked questions

### Is Campos Electromagnéticos (CEM) free?

Campos Electromagnéticos (CEM) is free to download, with no in-app purchases.

### Is Frequency Sound Wave Generator free?

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

### Do Campos Electromagnéticos (CEM) or Frequency Sound Wave Generator have ads?

Frequency Sound Wave Generator shows ads; Campos Electromagnéticos (CEM) does not.

### Which is updated more often, Campos Electromagnéticos (CEM) or Frequency Sound Wave Generator?

Campos Electromagnéticos (CEM) ships an update every 16 months, and Frequency Sound Wave Generator monthly. Most recently, Campos Electromagnéticos (CEM) was updated on October 25, 2026 and Frequency Sound Wave Generator on October 30, 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.*