# Decibel Meter X vs Spectrum Analyzer+ Audio FFT

The clearest difference is review sentiment: Decibel Meter X at 100% against Spectrum Analyzer+ Audio FFT's 0%. Decibel Meter X also leads on rating (4.7 vs 2.6) and ads (none vs shown). Spectrum Analyzer+ Audio FFT's advantage is update cadence (every 4 days vs every 4 weeks). On price, in-app purchases, device support and iOS requirement 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 holds the better App Store score, 4.7 against 2.6. That said, the two scores are not equally well evidenced: Decibel Meter X has 57 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 100% of Decibel Meter X's written reviews are positive against 0% of Spectrum Analyzer+ Audio FFT's.

Decibel Meter X ships an update every 4 weeks, Spectrum Analyzer+ Audio FFT every 4 days. The most recent releases landed on November 4, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Decibel Meter X | Spectrum Analyzer+ Audio FFT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (57 ratings)](https://appshunter.io/ios/app/decibel-meter-x/id6478142605/reviews)** | [2.6 (5 ratings)](https://appshunter.io/ios/app/spectrum-analyzer-plus-audio-fft/id6760830858/reviews) |
| Number of ratings | **57** | 5 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 weeks | **Every 4 days** |
| Monetization | **Free** | Ad-supported |
| Size | 6 MB | 95 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [永超 侯](https://appshunter.io/developer/906391544) | [Kyu-Hee Jang](https://appshunter.io/developer/1587578867) |

## 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


### Spectrum Analyzer+ Audio FFT

[App page](https://appshunter.io/ios/app/spectrum-analyzer-plus-audio-fft/id6760830858)

Analyze live audio frequencies from your microphone to identify peak Hz, hum, and room modes. Capture and average sound over five seconds to pinpoint the strongest frequencies and their levels. Compare changes by saving reference captures and analyzing differences.

**Highlights:** Live frequency spectrum display, 5-second audio capture and averaging, Peak frequency and level identification, Adjustable dB range, Reference capture comparison, Specialized analysis modes (Voice, Machine, Room), CSV export of spectrum data

**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 Spectrum Analyzer+ Audio FFT free?

Spectrum Analyzer+ Audio FFT is free to download, with no in-app purchases.

### Which has better reviews, Decibel Meter X or Spectrum Analyzer+ Audio FFT?

Decibel Meter X is rated higher. Decibel Meter X averages 4.7 out of 5 from 57 ratings, while Spectrum Analyzer+ Audio FFT averages 2.6 from 5 ratings.

### Do Decibel Meter X or Spectrum Analyzer+ Audio FFT have ads?

Spectrum Analyzer+ Audio FFT shows ads; Decibel Meter X does not.

### Which is updated more often, Decibel Meter X or Spectrum Analyzer+ Audio FFT?

Decibel Meter X ships an update every 4 weeks, and Spectrum Analyzer+ Audio FFT every 4 days. Most recently, Decibel Meter X was updated on November 4, 2026 and Spectrum Analyzer+ Audio FFT on November 9, 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.*