# Decibel X vs Audio Frequency Analyzer

The clearest difference is price: Decibel X at Free against Audio Frequency Analyzer's $9.99. Decibel X also leads on rating (4.6 vs 3.7) and ratings volume (164K vs 3). Audio Frequency Analyzer's advantage is in-app purchases (none vs 5). On review sentiment and ads there is nothing between them.

Decibel X is free to download; Audio Frequency Analyzer costs $9.99 up front. Decibel X sells 5 in-app purchases, starting at $1.99 per 7 days. Audio Frequency Analyzer asks for nothing beyond the download.

Decibel X holds the better App Store score, 4.6 against 3.7. That said, the two scores are not equally well evidenced: Decibel X has 164K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 66% of Decibel X's written reviews are positive against 60% of Audio Frequency Analyzer's.

Decibel X ships an update every 3 months, Audio Frequency Analyzer every 8 months. The most recent releases landed on November 4, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Decibel X | Audio Frequency Analyzer |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.6 (164K ratings)](https://appshunter.io/ios/app/decibel-xdb-sound-level-meter/id448155923/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/audio-frequency-analyzer/id684641742/reviews) |
| Number of ratings | **164K** | 3 |
| Positive reviews | **66.3% of reviews** | 60.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 8 months |
| Monetization | **Freemium** | Paid |
| Size | 90 MB | 0 MB |
| Requires iOS | **17.0** | 26.2 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SkyPaw Co., Limited](https://appshunter.io/developer/1842040687) | [TOON,LLC](https://appshunter.io/developer/633948723) |

## What reviewers say

### Decibel X

[App page](https://appshunter.io/ios/app/decibel-xdb-sound-level-meter/id448155923)

This tool transforms your device into a professional sound level meter, offering precise measurements of ambient noise. It features advanced calibration, frequency analysis, and data management for various applications, from personal curiosity to professional use.

**Highlights:** Pre-calibrated sound pressure level (SPL) measurements, Frequency weighting filters (dBA, dBC, ITU-R 468), Apple Watch and Health App integration, History data management with export options, Dosimeter with NIOSH, OSHA standards, FFT and BAR graphs for real-time frequency analysis, InstaDecibel for sharing dB reports on photos

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Membership | $1.99 | per 7 days |
| Monthly Membership | $5.99 | per month |
| Annual Membership | $49.99 | per year |
| ITU-R 468, A, B, C Weightings | $1.99 | one-time |
| Data Export | $2.99 | one-time |

**What reviewers like**

- ⭐ Excellent app
- 👍 Easy to use and understand
- 🔍 Useful for various applications
- 🎓 Helpful for hearing protection
- 🔧 Accurate and reliable

**What reviewers complain about**

- 💰 Expensive subscription model
- 🔒 Misleading free trial
- 📢 Intrusive ads
- 🤖 Inaccurate readings compared to professional meters
- 🤔 Confusing interface

**Reported bugs**

- App crashes when deleting recordings
- Microphone issues on certain devices
- Saved files not accessible after updates

**Requested features**

- Add GPS coordinates to recordings
- Improve reporting and data export
- Provide more weighting options
- Extend frequency range
- Allow music playback while using the app


### Audio Frequency Analyzer

[App page](https://appshunter.io/ios/app/audio-frequency-analyzer/id684641742)

This real-time audio analyzer measures and evaluates sound environments with 1/3 octave band frequency response and FFT analysis. It supports calibration for high accuracy and is suitable for various audio testing and tuning applications.

**Highlights:** Real-time frequency spectrum response measurement (1/3 octave, 30 bands), FFT Analyzer, Observation frequency range: 20 - 23000 Hz, Calibration function for high accuracy, Supports built-in and external microphones, Snapshot and averaging functions

**In-app purchases:** none


## Frequently asked questions

### Is Decibel X free?

Decibel X is free to download, with in-app purchases available.

### Is Audio Frequency Analyzer free?

Audio Frequency Analyzer costs $9.99, with no in-app purchases.

### Which has better reviews, Decibel X or Audio Frequency Analyzer?

Decibel X is rated higher. Decibel X averages 4.6 out of 5 from 164K ratings, while Audio Frequency Analyzer averages 3.7 from 3 ratings.

### Do Decibel X or Audio Frequency Analyzer have ads?

Neither Decibel X nor Audio Frequency Analyzer shows ads.

### Which is updated more often, Decibel X or Audio Frequency Analyzer?

Decibel X ships an update every 3 months, and Audio Frequency Analyzer every 8 months. Most recently, Decibel X was updated on November 4, 2026 and Audio Frequency Analyzer on November 1, 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.*