# Magnetometer vs Stud Finder Pro

The clearest difference is price: Stud Finder Pro at Free against Magnetometer's $1.99. Magnetometer's advantage is in-app purchases (none vs 1) and update cadence (weekly vs every 3 weeks). On ads and device support there is nothing between them.

Stud Finder Pro is free to download; Magnetometer costs $1.99 up front. Stud Finder Pro sells 1 in-app purchase, starting at $4.99 per 7 days. Magnetometer asks for nothing beyond the download.

Magnetometer ships an update weekly, Stud Finder Pro every 3 weeks. The most recent releases landed on October 24, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Magnetometer | Stud Finder Pro |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/magnetometer-emf-detector/id6752918170/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Paid | — |
| Size | 23 MB | 1 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SootheTrail Solutions LLC](https://appshunter.io/developer/1815309839) | [PROBABILITY LLC](https://appshunter.io/developer/1482354660) |

## What reviewers say

### Magnetometer

[App page](https://appshunter.io/ios/app/magnetometer-emf-detector/id6752918170)

Transform your device into a precise electromagnetic field detector. Ideal for electrical safety checks, scientific exploration, and environmental monitoring with real-time readings and historical data.

**Highlights:** Real-time EMF detection, Historical trend charts, Customizable alerts, Data export, Multiple units support, Adjustable sampling rates

**In-app purchases:** none


### Stud Finder Pro

[App page](https://appshunter.io/ios/app/stud-finder-pro-scanner/id6759052984)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $4.99 | per 7 days |


## Frequently asked questions

### Is Magnetometer free?

Magnetometer costs $1.99, with no in-app purchases.

### Is Stud Finder Pro free?

Stud Finder Pro is free to download, with in-app purchases available.

### Do Magnetometer or Stud Finder Pro have ads?

Neither Magnetometer nor Stud Finder Pro shows ads.

### Which is updated more often, Magnetometer or Stud Finder Pro?

Magnetometer ships an update weekly, and Stud Finder Pro every 3 weeks. Most recently, Magnetometer was updated on October 24, 2026 and Stud Finder Pro on October 5, 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.*