# Decibel Meter X vs Sound Level & Spectrogram

The clearest difference is ads: Decibel Meter X at none against Sound Level & Spectrogram's shown. Decibel Meter X also leads on update cadence (every 4 weeks vs every 5 months) and monetization model (free vs ad-supported). On price, review sentiment, 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.

Decibel Meter X ships an update every 4 weeks, Sound Level & Spectrogram every 5 months. The most recent releases landed on September 11, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Decibel Meter X | Sound Level & Spectrogram |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (49 ratings)](https://appshunter.io/ios/app/decibel-meter-x/id6478142605/reviews)** | — |
| Number of ratings | **49** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 4 weeks** | Every 5 months |
| Monetization | **Free** | Ad-supported |
| Size | 6 MB | 4 MB |
| Requires iOS | **16.0** | 18.7 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [永超 侯](https://appshunter.io/developer/906391544) | [TOON,LLC](https://appshunter.io/developer/633948723) |

## What reviewers say

### Decibel Meter X

[App page](https://appshunter.io/ios/app/decibel-meter-x/id6478142605)

This application precisely measures sound levels and analyzes audio spectrums. It can also generate specific frequency sounds for testing, research, or therapeutic purposes. Its intuitive interface makes sound exploration accessible to all users.

**Highlights:** Precise decibel level measurement, Audio spectrum analysis, Spectrogram display, Generate specific frequency sounds, Intuitive user interface, Detailed usage instructions

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

**In-app purchases:** none


### Sound Level & Spectrogram

[App page](https://appshunter.io/ios/app/sound-level-and-spectrogram/id6503722682)

Measure sound levels in decibels and visualize sound frequencies with a real-time spectrogram. Understand your environment's noise and protect your health. Offers advanced settings for accurate acoustic analysis.

**Highlights:** Sound level measurement (dB), Real-time spectrogram analysis, Frequency weighting correction (A, C, Z), Time weighting characteristics (Fast, Slow), Time course graph, Environmental noise measurement

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter X free?

Decibel Meter X is free to download, with no in-app purchases.

### Is Sound Level & Spectrogram free?

Sound Level & Spectrogram is free to download, with no in-app purchases.

### Do Decibel Meter X or Sound Level & Spectrogram have ads?

Sound Level & Spectrogram shows ads; Decibel Meter X does not.

### Which is updated more often, Decibel Meter X or Sound Level & Spectrogram?

Decibel Meter X ships an update every 4 weeks, and Sound Level & Spectrogram every 5 months. Most recently, Decibel Meter X was updated on September 11, 2026 and Sound Level & Spectrogram on September 18, 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.*