# Stud + Metal Scanner vs Ring Ruler

The clearest difference is iOS requirement: Ring Ruler at 13.0 against Stud + Metal Scanner's 15.6. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Stud + Metal Scanner | Ring Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stud-plus-metal-scanner/id6757409552/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Monetization | Free | — |
| Size | 5 MB | 21 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [PRADEEP CHENDURAN BALASUNDARAM](https://appshunter.io/developer/1866726591) | [David Sent](https://appshunter.io/developer/1696600749) |

## What reviewers say

### Stud + Metal Scanner

[App page](https://appshunter.io/ios/app/stud-plus-metal-scanner/id6757409552)

Instantly locate studs, screws, and nails behind walls, or measure magnetic fields (EMF) using your iPhone's built-in sensor. This dual-mode utility is perfect for DIY projects, home improvement, and scientific exploration.

**Highlights:** Stud finder mode, Magnetometer (EMF) mode, Detect studs, screws, nails, and metal, Measure magnetic fields in real-time, Graph view for field changes, Pause scans for precision readings, Re-zero sensor for accuracy

**In-app purchases:** none


### Ring Ruler

[App page](https://appshunter.io/ios/app/ring-ruler/id6757495549)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Stud + Metal Scanner free?

Stud + Metal Scanner is free to download, with no in-app purchases.

### Is Ring Ruler free?

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

### Do Stud + Metal Scanner or Ring Ruler have ads?

Neither Stud + Metal Scanner nor Ring Ruler shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*