# Audio Spectrum Analyzer vs Frequency Analyzer

The clearest difference is price: Frequency Analyzer at Free against Audio Spectrum Analyzer's $3.99. Frequency Analyzer also leads on rating (4.5 vs 3.9) and update cadence (every 8 days vs every 7 months). Audio Spectrum Analyzer's advantage is review sentiment (54% vs 10%) and in-app purchases (none vs 11). On ads there is nothing between them.

Frequency Analyzer is free to download; Audio Spectrum Analyzer costs $3.99 up front. Frequency Analyzer sells 11 in-app purchases, starting at $2.99 per 7 days. Audio Spectrum Analyzer asks for nothing beyond the download.

Frequency Analyzer holds the better App Store score, 4.5 against 3.9. Both are backed by a comparable volume of ratings — 52 and 168 respectively. Written reviews complicate that: 54% of Audio Spectrum Analyzer's written reviews are positive against 10% of Frequency Analyzer'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, Frequency Analyzer every 8 days. Both last shipped on September 30, 2026.

## The numbers

| Metric | Audio Spectrum Analyzer | Frequency Analyzer |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [3.9 (52 ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer/id373620982/reviews) | **[4.5 (168 ratings)](https://appshunter.io/ios/app/frequency-analyzer/id6468837339/reviews)** |
| Number of ratings | 52 | **168** |
| Positive reviews | **54.4% of reviews** | 10.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 8 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 35 MB |
| Requires iOS | **6.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Black Cat Systems](https://appshunter.io/developer/301047032) | [Manfred Kuegel](https://appshunter.io/developer/1520736594) |

## 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


### Frequency Analyzer

[App page](https://appshunter.io/ios/app/frequency-analyzer/id6468837339)

Transform your device into a professional audio analysis tool with advanced FFT analysis, SPL monitoring, and detailed visualizations. Record, analyze, and export audio data with precision calibration and multiple weighting filters.

**Highlights:** Real-time FFT analysis, Calibrated SPL measurements, 32-bit float audio recording, Synchronized video recording, Spectrogram and octave band analysis, Export WAV, CSV, images, and videos

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Frequency Analyzer Pro Weekly | $2.99 | per 7 days |
| Frequency Analyzer Pro Monthly | $3.99 | per month |
| Frequency Analyzer Pro Monthly | $3.99 | per month |
| Frequency Analyzer Pro Monthly | $4.99 | per month |
| Frequency Analyzer Pro Monthly | $4.99 | per month |
| Frequency Analyzer Pro Monthly | $4.99 | per month |
| Frequency Analyzer Pro Annual | $29.99 | per year |
| Frequency Analyzer Pro Annual | $44.99 | per year |
| Frequency Analyzer Pro Annual | $44.99 | per year |
| Frequency Analyzer Pro Annual | $44.99 | per year |
| Pro access for lifetime | $89.99 | one-time |


## Frequently asked questions

### Is Audio Spectrum Analyzer free?

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

### Is Frequency Analyzer free?

Frequency Analyzer is free to download, with in-app purchases available.

### Which has better reviews, Audio Spectrum Analyzer or Frequency Analyzer?

Frequency Analyzer is rated higher. Audio Spectrum Analyzer averages 3.9 out of 5 from 52 ratings, while Frequency Analyzer averages 4.5 from 168 ratings.

### Do Audio Spectrum Analyzer or Frequency Analyzer have ads?

Neither Audio Spectrum Analyzer nor Frequency Analyzer shows ads.

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

Audio Spectrum Analyzer ships an update every 7 months, and Frequency Analyzer every 8 days. Most recently, Audio Spectrum Analyzer was updated on September 30, 2026 and Frequency Analyzer on September 30, 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.*