# Sensor Node vs Metal Detector

The clearest difference is in-app purchases: Sensor Node at none against Metal Detector's 3. Sensor Node also leads on update cadence (every 2 months vs every 5 months) and iOS requirement (11.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Metal Detector sells 3 in-app purchases, starting at $3.99 per 7 days. Sensor Node asks for nothing beyond the download.

Sensor Node ships an update every 2 months, Metal Detector every 5 months. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Sensor Node | Metal Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (8 ratings)](https://appshunter.io/ios/app/metal-detector-stud-finder/id6747976917/reviews)** |
| Number of ratings | — | **8** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | — | Freemium |
| Size | 42 MB | 123 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Monkeytronics Ltd](https://appshunter.io/developer/1479351147) | [Reena Williams](https://appshunter.io/developer/1708538764) |

## What reviewers say

### Sensor Node

[App page](https://appshunter.io/ios/app/sensor-node/id1479934464)

**Features:** macOS Compatibility

**In-app purchases:** none


### Metal Detector

[App page](https://appshunter.io/ios/app/metal-detector-stud-finder/id6747976917)

This utility app uses your iPhone's sensors to detect metals, studs, and electromagnetic fields. It can also identify lens reflections and analyze WiFi networks for potential surveillance devices, offering a comprehensive scanning tool for security and home improvement.

**Highlights:** Metal and stud detection, Lens reflection scanner, EMF meter, WiFi analyzer, Easy calibration, Lightweight and portable

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $3.99 | per 7 days |
| Weekly Subscription | $5.99 | per 7 days |
| Yearly Subscriptions | $39.99 | per year |


## Frequently asked questions

### Is Sensor Node free?

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

### Is Metal Detector free?

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

### Do Sensor Node or Metal Detector have ads?

Neither Sensor Node nor Metal Detector shows ads.

### Which is updated more often, Sensor Node or Metal Detector?

Sensor Node ships an update every 2 months, and Metal Detector every 5 months. Most recently, Sensor Node was updated on October 25, 2026 and Metal Detector 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.*