# Metal Detector・EMF Reader vs TFAuth

The clearest difference is device support: TFAuth at 3 against Metal Detector・EMF Reader's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Metal Detector・EMF Reader sells 1 one-off in-app purchase and TFAuth sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Metal Detector・EMF Reader ships an update weekly, TFAuth every 5 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | Metal Detector・EMF Reader | TFAuth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/metal-detectoremf-reader/id6749162622/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Monetization | Free | — |
| Size | 18 MB | 16 MB |
| Requires iOS | **16.6** | 17.6 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Yash Mandhyan](https://appshunter.io/developer/1856960217) | [Alex Khalkho](https://appshunter.io/developer/1884305629) |

## What reviewers say

### Metal Detector・EMF Reader

[App page](https://appshunter.io/ios/app/metal-detectoremf-reader/id6749162622)

Transform your iPhone into a versatile tool for detecting metal objects, locating wall studs, and measuring EMF levels. Utilize the device's built-in magnetometer for real-time insights into magnetic fields and signal strength, perfect for various DIY and utility tasks.

**Highlights:** Detect nearby metal objects, Find wall studs, screws, nails, pipes, Real-time magnetic field readings, Live EMF meter and graph visualization, Signal confidence indicator, Axis-based directional detection

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $2.99 | one-time |


### TFAuth

[App page](https://appshunter.io/ios/app/tfauth/id6760404590)

**Features:** macOS Compatibility, Safari Extension, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $0.99 | one-time |
| Pro+ | $1.99 | one-time |


## Frequently asked questions

### Is Metal Detector・EMF Reader free?

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

### Is TFAuth free?

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

### Do Metal Detector・EMF Reader or TFAuth have ads?

Neither Metal Detector・EMF Reader nor TFAuth shows ads.

### Which is updated more often, Metal Detector・EMF Reader or TFAuth?

Metal Detector・EMF Reader ships an update weekly, and TFAuth every 5 days. Most recently, Metal Detector・EMF Reader was updated on October 25, 2026 and TFAuth on October 25, 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.*