# Audio Spectrum Analyzer Pro vs Sonic Hz Frequency Generator

Audio Spectrum Analyzer Pro and Sonic Hz Frequency Generator both sit at 4.4 stars, but that hides the real split: 57% of Audio Spectrum Analyzer Pro's written reviews are positive against 10% of Sonic Hz Frequency Generator's. Audio Spectrum Analyzer Pro also leads on ads (none vs shown) and iOS requirement (13.0 vs 16.6). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Audio Spectrum Analyzer Pro sells 2 in-app purchases, starting at $19.99 per year and Sonic Hz Frequency Generator sells 4 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.4 for Audio Spectrum Analyzer Pro against 4.2 for Sonic Hz Frequency Generator. Both are backed by a comparable volume of ratings — 239 and 109 respectively. Written reviews are what separate them: 57% of Audio Spectrum Analyzer Pro's written reviews are positive against 10% of Sonic Hz Frequency Generator's.

Audio Spectrum Analyzer Pro ships an update every 7 months, Sonic Hz Frequency Generator every 3 months. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Audio Spectrum Analyzer Pro | Sonic Hz Frequency Generator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (239 ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer-pro/id1152352806/reviews)** | [4.2 (109 ratings)](https://appshunter.io/ios/app/sonic-hz-frequency-generator/id1603037697/reviews) |
| Number of ratings | **239** | 109 |
| Positive reviews | **57.4% of reviews** | 10.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 40 MB | 19 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vlad Polyanskiy](https://appshunter.io/developer/438646985) | [汇杭 钟](https://appshunter.io/developer/1481585840) |

## What reviewers say

### Audio Spectrum Analyzer Pro

[App page](https://appshunter.io/ios/app/audio-spectrum-analyzer-pro/id1152352806)

Analyze sound frequencies in real-time with this powerful tool. It offers detailed octave band analysis, FFT plots, and various measurement scales. Supports multiple microphones and noise analysis features for accurate audio insights.

**Highlights:** Octave Band Real Time Analyzer, FFT Plot (Fast Fourier Transform), Sound level meter (dB meter), Noise Rating and Noise Criterion support, Support for external microphones, Pre-calibrated mic profiles

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Mode | $19.99 | per year |
| Premium Pack | $29.99 | one-time |

**What reviewers like**

- 👍 Intuitive and easy-to-use interface
- 💰 Completely free with no ads
- 🎯 Accurate frequency and spectrum analysis
- 📊 Multiple visualization modes (FFT, spectrograph, bar display)
- 🔧 Professional-grade audio measurement tool

**What reviewers complain about**

- 💸 Aggressive subscription/paywall nags
- 🔄 Frequent iOS compatibility issues after updates
- 📉 Features moved behind paywall in recent updates
- 🐛 App crashes on startup (especially iOS 16/26)
- ⚠️ Misleading free trial that requires payment

**Reported bugs**

- App crashes on iOS 16 and iOS 26 launches
- FFT resolution not working after iOS updates
- Graph display freezes or becomes unresponsive
- Spectrograph mode too slow on newer iPhones
- Frequency alignment issues with dynamic display

**Requested features**

- Audio file upload capability
- White noise/test signal generator
- Microphone calibration file support
- Recording functionality with timestamp
- Multiple frequency cursors for comparison


### Sonic Hz Frequency Generator

[App page](https://appshunter.io/ios/app/sonic-hz-frequency-generator/id1603037697)

Generate precise audio tones from 20 Hz to 20,000 Hz with various waveforms. Utilize binaural beats for meditation, sleep, and focus. Also includes a speaker cleaning function to improve audio quality.

**Highlights:** Pure tone generation (20 Hz - 20,000 Hz), Sine, square, sawtooth, triangle waveforms, Binaural beats for sleep, focus, and meditation, Speaker cleaning function, Customizable presets, Background audio playback

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium · Weekly | $6.99 | per 7 days |
| Premium for 1 month | $9.99 | per month |
| Premium for 12 months | $29.99 | per year |
| Premium Version | $69.99 | one-time |


## Frequently asked questions

### Is Audio Spectrum Analyzer Pro free?

Audio Spectrum Analyzer Pro is free to download, with in-app purchases available.

### Is Sonic Hz Frequency Generator free?

Sonic Hz Frequency Generator is free to download, with in-app purchases available.

### Which has better reviews, Audio Spectrum Analyzer Pro or Sonic Hz Frequency Generator?

Audio Spectrum Analyzer Pro is rated higher. Audio Spectrum Analyzer Pro averages 4.4 out of 5 from 239 ratings, while Sonic Hz Frequency Generator averages 4.2 from 109 ratings.

### Do Audio Spectrum Analyzer Pro or Sonic Hz Frequency Generator have ads?

Sonic Hz Frequency Generator shows ads; Audio Spectrum Analyzer Pro does not.

### Which is updated more often, Audio Spectrum Analyzer Pro or Sonic Hz Frequency Generator?

Audio Spectrum Analyzer Pro ships an update every 7 months, and Sonic Hz Frequency Generator every 3 months. Most recently, Audio Spectrum Analyzer Pro was updated on November 6, 2026 and Sonic Hz Frequency Generator on November 7, 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.*