# Metal Detector vs SIGMA RAP

The clearest difference is in-app purchases: SIGMA RAP at none against Metal Detector's 6. SIGMA RAP also leads on ads (none vs shown) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. Metal Detector sells 6 in-app purchases, starting at $0.99 per 7 days. SIGMA RAP asks for nothing beyond the download.

## The numbers

| Metric | Metal Detector | SIGMA RAP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (415 ratings)](https://appshunter.io/ios/app/metal-detector-stud-finder/id6444347206/reviews)** | — |
| Number of ratings | **415** | — |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | — |
| Monetization | Subscription | — |
| Size | 15 MB | 24 MB |
| Requires iOS | 18.0 | **11.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [AppLiks Sp. z O.O.](https://appshunter.io/developer/1804335622) | [ID&A S.r.l.](https://appshunter.io/developer/1446283055) |

## What reviewers say

### Metal Detector

[App page](https://appshunter.io/ios/app/metal-detector-stud-finder/id6444347206)

This app uses your phone's magnetic sensor to detect nearby metal objects like keys, coins, or wires within walls. It also includes a suite of useful virtual tools such as a tape measure, ruler, protractor, and level.

**Highlights:** Metal detection, Virtual tape measure, Protractor, Ruler, Level tool

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Metal Detector Premium Pack | $0.99 | per 7 days |
| Weekly Access | $0.99 | per 7 days |
| Metal Detector: Pro Version | $2.99 | per month |
| Monthly Access | $2.99 | per month |
| Metal Detector PRO | $5.99 | per year |
| Yearly Access | $5.99 | per year |

**What reviewers like**

- 👍 Useful for finding lost items
- 👍 Accurate metal detection
- 👍 Easy to use
- 💡 Includes helpful bonus tools (protractor, level, tape measure, ruler)
- 👍 Works well for mapping rebar in foundations

**What reviewers complain about**

- 🐛 Difficulty cancelling subscription
- 🐛 Does not work for finding studs
- 🐛 Stops working after initial use
- 🐛 Inconsistent performance (same noise all over wall)
- 🐛 Does not detect metal (e.g., keys) even when phone is on top

**Reported bugs**

- App stops working after first day
- App makes the same noise all over the wall
- App fails to detect metal objects like keys or belt buckles

**Requested features**

- Option to cancel subscription within the app


### SIGMA RAP

[App page](https://appshunter.io/ios/app/sigma-rap/id6744170583)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Metal Detector free?

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

### Is SIGMA RAP free?

SIGMA RAP is free to download, with no in-app purchases.

### Do Metal Detector or SIGMA RAP have ads?

Metal Detector shows ads; SIGMA RAP does not.

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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.*