# SPL Meter vs Note Calculator Plus

The clearest difference is price: SPL Meter at Free against Note Calculator Plus's $2.99. SPL Meter also leads on iOS requirement (12.0 vs 26.5). Note Calculator Plus's advantage is in-app purchases (none vs 3). On ads and device support there is nothing between them.

SPL Meter is free to download; Note Calculator Plus costs $2.99 up front. SPL Meter sells 3 in-app purchases, starting at $2.99 per 7 days. Note Calculator Plus asks for nothing beyond the download.

## The numbers

| Metric | SPL Meter | Note Calculator Plus |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.9 (14 ratings)](https://appshunter.io/ios/app/spl-meter-db-noise-tool/id6751081307/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Freemium | — |
| Size | 32 MB | 13 MB |
| Requires iOS | **12.0** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CODIGITAL SOLUTIONS](https://appshunter.io/developer/1829802387) | [Vijayvir Singh](https://appshunter.io/developer/1469680736) |

## What reviewers say

### SPL Meter

[App page](https://appshunter.io/ios/app/spl-meter-db-noise-tool/id6751081307)

Transform your device into a professional sound level meter to measure decibels in real-time. Monitor noise levels, visualize sound frequencies, and track your exposure to ensure safe hearing limits.

**Highlights:** Accurate noise level detection, Live audio monitoring, Professional calibration, Detailed noise history, Advanced spectrogram view, Noise exposure tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Access | $2.99 | per 7 days |
| Pro Access | $4.99 | per month |
| Pro Access | $29.99 | per year |


### Note Calculator Plus

[App page](https://appshunter.io/ios/app/note-calculator-plus/id6791851793)

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

**In-app purchases:** none


## Frequently asked questions

### Is SPL Meter free?

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

### Is Note Calculator Plus free?

Note Calculator Plus costs $2.99, with no in-app purchases.

### Do SPL Meter or Note Calculator Plus have ads?

Neither SPL Meter nor Note Calculator Plus shows ads.

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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.*