# Random Sound Recorder vs TeslaVision EMF Detector

The clearest difference is price: Random Sound Recorder at Free against TeslaVision EMF Detector's $4.99. Random Sound Recorder also leads on device support (3 vs 1) and iOS requirement (11.0 vs 18.0). TeslaVision EMF Detector's advantage is chart position (#179 vs unranked). On update cadence, ads and in-app purchases there is nothing between them.

Random Sound Recorder is free to download; TeslaVision EMF Detector costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Random Sound Recorder ships an update every 9 months, TeslaVision EMF Detector every 13 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Random Sound Recorder | TeslaVision EMF Detector |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | — | **[4.4 (10 ratings)](https://appshunter.io/ios/app/teslavision-emf-detector/id6469668984/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 months** | Every 13 months |
| Monetization | — | Paid |
| Best chart rank | — | **#179** |
| Size | 0 MB | 2 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ralph Cos](https://appshunter.io/developer/573505028) | [Michael Weber](https://appshunter.io/developer/349078052) |

## What reviewers say

### Random Sound Recorder

[App page](https://appshunter.io/ios/app/random-sound-recorder/id608045136)

**Features:** macOS Compatibility

**In-app purchases:** none


### TeslaVision EMF Detector

[App page](https://appshunter.io/ios/app/teslavision-emf-detector/id6469668984)

**Currently charting:** #179 Top Paid · Utilities (US App Store)

Detect, measure, and visualize ambient electromagnetic fields in real-time. This professional-grade tool offers detailed analysis, data export, and customizable settings for monitoring your electromagnetic environment.

**Highlights:** Real-time EMF measurement, 2D and 3D EMF visualization, Raw EMF data export, Customizable EMF calibration, Adjustable EMF sensitivity, Record and analyze EMF sessions

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Random Sound Recorder free?

Random Sound Recorder is free to download, with no in-app purchases.

### Is TeslaVision EMF Detector free?

TeslaVision EMF Detector costs $4.99, with no in-app purchases.

### Do Random Sound Recorder or TeslaVision EMF Detector have ads?

Neither Random Sound Recorder nor TeslaVision EMF Detector shows ads.

### Which is updated more often, Random Sound Recorder or TeslaVision EMF Detector?

Random Sound Recorder ships an update every 9 months, and TeslaVision EMF Detector every 13 months. Most recently, Random Sound Recorder was updated on November 1, 2026 and TeslaVision EMF Detector on November 3, 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.*