# Audio Spectrum Analyzer vs Decibel Meter Ultra

The clearest difference is price: Decibel Meter Ultra at Free against Audio Spectrum Analyzer's $3.99. Decibel Meter Ultra also leads on rating (4.6 vs 3.9) and update cadence (every 10 days vs every 7 months). Audio Spectrum Analyzer's advantage is in-app purchases (none vs 7) and review sentiment (54% vs 43%). On ads there is nothing between them.

Decibel Meter Ultra is free to download; Audio Spectrum Analyzer costs $3.99 up front. Decibel Meter Ultra sells 6 in-app purchases, starting at $7.99 per 7 days. Audio Spectrum Analyzer asks for nothing beyond the download.

Decibel Meter Ultra holds the better App Store score, 4.6 against 3.9. That said, the two scores are not equally well evidenced: Decibel Meter Ultra has 2.6K ratings behind it against 53, so its average is the more settled of the two. Written reviews complicate that: 54% of Audio Spectrum Analyzer's written reviews are positive against 43% of Decibel Meter Ultra's, so the app with the better star average is not the one people write more warmly about.

Audio Spectrum Analyzer ships an update every 7 months, Decibel Meter Ultra every 10 days. The most recent releases landed on November 10, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | Audio Spectrum Analyzer | Decibel Meter Ultra |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [3.9 (53 ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer/id373620982/reviews) | **[4.6 (2.6K ratings)](https://appshunter.io/ios/app/decibel-meter-ultra/id1643525961/reviews)** |
| Number of ratings | 53 | **2.6K** |
| Positive reviews | **54.4% of reviews** | 42.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 10 days** |
| Monetization | Paid | **Freemium** |
| Size | 1 MB | 91 MB |
| Requires iOS | **6.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Black Cat Systems](https://appshunter.io/developer/301047032) | [Ultrafine](https://appshunter.io/developer/1558108175) |

## What reviewers say

### Audio Spectrum Analyzer

[App page](https://appshunter.io/ios/app/audio-spectrum-analyzer/id373620982)

Transform your iOS device into a powerful audio spectrum analyzer. Visualize frequencies up to 20 kHz with customizable display options including frequency span, FFT size, and logarithmic views. Enhance analysis with filtering, peak hold, and adjustable decay rates.

**Highlights:** Frequency analysis up to 20 kHz, Adjustable frequency span and FFT size, Logarithmic frequency display, Graph fill mode toggle, Up to five frequency markers, Spectrum filtering and averaging, Peak hold with adjustable decay rate

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

**In-app purchases:** none

**What reviewers like**

- 👍 Handy for recording studio
- 👍 Excellent for analyzing noise
- 👍 Intuitive and simple
- 👍 Great for tuning
- 👍 Accurate on iPad mini

**What reviewers complain about**

- 👎 Does not work with newer iPhones
- 👎 Not updated in years
- 👎 Stopped working quickly
- 👎 Sold with false pretenses
- 👎 Extremely slow on iPhone 7

**Reported bugs**

- No way to exit on iPhones without Home button
- Doesn't work with iPhone XR
- Stopped working after about 3 minutes
- Zooming sometimes doesn't work
- Resuming app makes it not display frequency data

**Requested features**

- Running average of spectrums
- Ability to exit on iPhones without Home button
- Ability to reset peak hold with a tap
- Go to 40 kHz
- Expand instructions for filtering window


### Decibel Meter Ultra

[App page](https://appshunter.io/ios/app/decibel-meter-ultra/id1643525961)

Measure, record, and analyze sound levels with this comprehensive tool. It offers precision metering, noise elimination features, hearing protection guidance, and home audio calibration. Visualize sound over time and generate shareable reports.

**Highlights:** Precision sound level metering, Noise level recording and tracking, Hearing protection and dosimeter features, Fractional octave band analysis, Acoustic analysis report generation, Real-time sound visualization

**Features:** iPhone Duo support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Access | $7.99 | per 7 days |
| PRO Access | $9.99 | per 7 days |
| PRO Access | $11.99 | per month |
| PRO Access | $39.99 | per year |
| PRO Access | $39.99 | per year |
| PRO Access | $59.99 | per year |

**What reviewers like**

- 🎨 Aesthetically pleasing design
- 🔍 Useful noise monitoring features
- 🔍 Ability to collect noise evidence

**What reviewers complain about**

- 💰 Expensive subscription pricing
- 🚫 Misleading free trial claims
- 🚫 Difficult to cancel subscription
- 🔍 Inconsistent noise level readings

**Reported bugs**

- Subscription charges continue after cancellation
- Subscription cancellation page doesn't load

**Requested features**

- Lower subscription pricing
- Improve subscription cancellation process


## Frequently asked questions

### Is Audio Spectrum Analyzer free?

Audio Spectrum Analyzer costs $3.99, with no in-app purchases.

### Is Decibel Meter Ultra free?

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

### Which has better reviews, Audio Spectrum Analyzer or Decibel Meter Ultra?

Decibel Meter Ultra is rated higher. Audio Spectrum Analyzer averages 3.9 out of 5 from 53 ratings, while Decibel Meter Ultra averages 4.6 from 2.6K ratings.

### Do Audio Spectrum Analyzer or Decibel Meter Ultra have ads?

Neither Audio Spectrum Analyzer nor Decibel Meter Ultra shows ads.

### Which is updated more often, Audio Spectrum Analyzer or Decibel Meter Ultra?

Audio Spectrum Analyzer ships an update every 7 months, and Decibel Meter Ultra every 10 days. Most recently, Audio Spectrum Analyzer was updated on November 10, 2026 and Decibel Meter Ultra on November 13, 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.*