# Metal Detector EMF+ vs Engineer Ally Mobile

The clearest difference is in-app purchases: Engineer Ally Mobile at none against Metal Detector EMF+'s 3. Metal Detector EMF+'s advantage is update cadence (monthly vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Metal Detector EMF+ sells 3 in-app purchases, starting at $0.99 per 7 days. Engineer Ally Mobile asks for nothing beyond the download.

Metal Detector EMF+ ships an update monthly, Engineer Ally Mobile every 3 months. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Metal Detector EMF+ | Engineer Ally Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (8 ratings)](https://appshunter.io/ios/app/metal-detector-emf-plus/id6736949895/reviews)** | — |
| Number of ratings | **8** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Subscription | — |
| Size | 18 MB | 66 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [子煜 孟](https://appshunter.io/developer/1690092242) | [Engineer Ally](https://appshunter.io/developer/1718528510) |

## What reviewers say

### Metal Detector EMF+

[App page](https://appshunter.io/ios/app/metal-detector-emf-plus/id6736949895)

This utility app uses your device's magnetometer to measure magnetic fields and detect metal objects. It offers real-time data, customizable alerts, and historical logging for various applications.

**Highlights:** Magnetic field measurement, Metal object detection, Real-time data display, Customizable alerts, Historical data logging, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $0.99 | per 7 days |
| Weekly Subscription | $1.99 | per 7 days |
| Lifetime Use | $4.99 | one-time |


### Engineer Ally Mobile

[App page](https://appshunter.io/ios/app/engineer-ally-mobile/id6748547519)

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

**In-app purchases:** none


## Frequently asked questions

### Is Metal Detector EMF+ free?

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

### Is Engineer Ally Mobile free?

Engineer Ally Mobile is free to download, with no in-app purchases.

### Do Metal Detector EMF+ or Engineer Ally Mobile have ads?

Neither Metal Detector EMF+ nor Engineer Ally Mobile shows ads.

### Which is updated more often, Metal Detector EMF+ or Engineer Ally Mobile?

Metal Detector EMF+ ships an update monthly, and Engineer Ally Mobile every 3 months. Most recently, Metal Detector EMF+ was updated on October 30, 2026 and Engineer Ally Mobile 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.*