# logSPL vs Metal Detector 3D Plus

The clearest difference is update cadence: logSPL at every 4 months against Metal Detector 3D Plus's every 38 months. logSPL also leads on price ($1.99 vs $2.99). Metal Detector 3D Plus's advantage is iOS requirement (13.0 vs 15.2). On ads, in-app purchases and device support there is nothing between them.

logSPL costs $1.99 and Metal Detector 3D Plus $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

logSPL ships an update every 4 months, Metal Detector 3D Plus every 38 months. The most recent releases landed on October 8, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | logSPL | Metal Detector 3D Plus |
| --- | --- | --- |
| Price | **$1.99** | $2.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/logspl/id491999427/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 38 months |
| Monetization | Paid | — |
| Size | 1 MB | 2 MB |
| Requires iOS | 15.2 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fabien Lefebvre](https://appshunter.io/developer/338004167) | [Heng Jia Liang](https://appshunter.io/developer/1532000635) |

## What reviewers say

### logSPL

[App page](https://appshunter.io/ios/app/logspl/id491999427)

This app functions as a sophisticated sound level meter, offering both basic and advanced features for measuring noise. It allows users to adjust update rates, select weighting types, and view historical data and real-time histograms. Calibration is recommended for optimal accuracy.

**Highlights:** Sound level measurement, Adjustable update rates (fast/slow), Weighting options (A, C, Z), Min/max value monitoring, Average value computation (Leq), Historical curve with grid, Real-time histogram, Dosemetering capabilities

**Features:** Vision Pro support

**In-app purchases:** none


### Metal Detector 3D Plus

[App page](https://appshunter.io/ios/app/metal-detector-3d-plus/id1619596809)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is logSPL free?

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

### Is Metal Detector 3D Plus free?

Metal Detector 3D Plus costs $2.99, with no in-app purchases.

### Do logSPL or Metal Detector 3D Plus have ads?

Neither logSPL nor Metal Detector 3D Plus shows ads.

### Which is updated more often, logSPL or Metal Detector 3D Plus?

logSPL ships an update every 4 months, and Metal Detector 3D Plus every 38 months. Most recently, logSPL was updated on October 8, 2026 and Metal Detector 3D Plus on October 27, 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.*