# Decibel Meter X vs FNam FFT Spectrogram Analyzer

The clearest difference is iOS requirement: Decibel Meter X at 16.0 against FNam FFT Spectrogram Analyzer's 18.0. On price, update cadence, ads and in-app purchases 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, FNam FFT Spectrogram Analyzer fortnightly. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Decibel Meter X | FNam FFT Spectrogram Analyzer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (56 ratings)](https://appshunter.io/ios/app/decibel-meter-x/id6478142605/reviews)** | — |
| Number of ratings | **56** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | Free | — |
| Size | 6 MB | 4 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [永超 侯](https://appshunter.io/developer/906391544) | [YEON SEOB KIM](https://appshunter.io/developer/1878586254) |

## 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


### FNam FFT Spectrogram Analyzer

[App page](https://appshunter.io/ios/app/fnam-fft-spectrogram-analyzer/id6759438376)

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

**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 FNam FFT Spectrogram Analyzer free?

FNam FFT Spectrogram Analyzer is free to download, with no in-app purchases.

### Do Decibel Meter X or FNam FFT Spectrogram Analyzer have ads?

Neither Decibel Meter X nor FNam FFT Spectrogram Analyzer shows ads.

### Which is updated more often, Decibel Meter X or FNam FFT Spectrogram Analyzer?

Decibel Meter X ships an update every 4 weeks, and FNam FFT Spectrogram Analyzer fortnightly. Most recently, Decibel Meter X was updated on October 24, 2026 and FNam FFT Spectrogram Analyzer on October 11, 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.*