# TeslaVision EMF Detector vs RAYSID

The clearest difference is price: RAYSID at Free against TeslaVision EMF Detector's $4.99. RAYSID also leads on rating (5.0 vs 4.4) and update cadence (weekly vs every 13 months). TeslaVision EMF Detector's advantage is ratings volume (10 vs 1). On ads, in-app purchases and device support there is nothing between them.

RAYSID 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.

RAYSID holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: TeslaVision EMF Detector has 10 ratings behind it against 1, so its average is the more settled of the two.

TeslaVision EMF Detector ships an update every 13 months, RAYSID weekly. The most recent releases landed on October 1, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | TeslaVision EMF Detector | RAYSID |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.4 (10 ratings)](https://appshunter.io/ios/app/teslavision-emf-detector/id6469668984/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/raysid/id6763330523/reviews)** |
| Number of ratings | **10** | 1 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Weekly** |
| Monetization | Paid | **Free** |
| Size | 2 MB | 145 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Michael Weber](https://appshunter.io/developer/349078052) | [Isai Olvera](https://appshunter.io/developer/1895267343) |

## What reviewers say

### TeslaVision EMF Detector

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

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


### RAYSID

[App page](https://appshunter.io/ios/app/raysid/id6763330523)

This app connects to a RAYSID gamma spectrometer via Bluetooth to display real-time radiation data. It offers detailed spectrum analysis, automatic isotope identification, and customizable device alarms. Data is stored locally on your phone.

**Highlights:** Real-time count rate and dose rate, Automatic isotope identification, High-resolution spectrum analysis, Device threshold alarms with notifications, Export spectrum data to N42 file, Phone-side Geiger clicks

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

**In-app purchases:** none


## Frequently asked questions

### Is TeslaVision EMF Detector free?

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

### Is RAYSID free?

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

### Which has better reviews, TeslaVision EMF Detector or RAYSID?

RAYSID is rated higher. TeslaVision EMF Detector averages 4.4 out of 5 from 10 ratings, while RAYSID averages 5.0 from 1 ratings.

### Do TeslaVision EMF Detector or RAYSID have ads?

Neither TeslaVision EMF Detector nor RAYSID shows ads.

### Which is updated more often, TeslaVision EMF Detector or RAYSID?

TeslaVision EMF Detector ships an update every 13 months, and RAYSID weekly. Most recently, TeslaVision EMF Detector was updated on October 1, 2026 and RAYSID on October 6, 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.*