# dTector vs RAYSID

The clearest difference is rating: RAYSID at 5.0 against dTector's 4.1. RAYSID also leads on in-app purchases (none vs 1) and ads (none vs shown). dTector's advantage is ratings volume (7 vs 1) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. dTector sells 1 one-off in-app purchase. RAYSID asks for nothing beyond the download.

RAYSID holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: dTector has 7 ratings behind it against 1, so its average is the more settled of the two.

dTector ships an update every 6 weeks, RAYSID weekly. The most recent releases landed on October 3, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | dTector | RAYSID |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (7 ratings)](https://appshunter.io/ios/app/dtector-metal-detector-ar/id910643165/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/raysid/id6763330523/reviews)** |
| Number of ratings | **7** | 1 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 8 MB | 145 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Immaginet Srl](https://appshunter.io/developer/545184631) | [Isai Olvera](https://appshunter.io/developer/1895267343) |

## What reviewers say

### dTector

[App page](https://appshunter.io/ios/app/dtector-metal-detector-ar/id910643165)

This utility app transforms your iPhone into a magnetic field detector using its built-in magnetometer. It visualizes magnetic fields in 3D augmented reality, highlighting areas of strong magnetic flux. Useful for detecting ferromagnetic metals and understanding magnetic environments.

**Highlights:** Live magnetometer readout (µT and mG), Ferromagnetic metal detection, AR 3D field mapping, Sonar feedback (sound and haptics), Directional guidance, Session logging and PLY export, Apple Watch companion

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| dTector PRO | $4.99 | one-time |


### 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 dTector free?

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

### Is RAYSID free?

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

### Which has better reviews, dTector or RAYSID?

RAYSID is rated higher. dTector averages 4.1 out of 5 from 7 ratings, while RAYSID averages 5.0 from 1 ratings.

### Do dTector or RAYSID have ads?

dTector shows ads; RAYSID does not.

### Which is updated more often, dTector or RAYSID?

dTector ships an update every 6 weeks, and RAYSID weekly. Most recently, dTector was updated on October 3, 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.*