# Spectrum Analyzer vs Sonic Hz Frequency Generator

The clearest difference is update cadence: Spectrum Analyzer at fortnightly against Sonic Hz Frequency Generator's every 3 months. On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Spectrum Analyzer sells 13 in-app purchases, starting at $4.99 per 7 days 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 — 4.2 for Spectrum Analyzer against 4.2 for Sonic Hz Frequency Generator. Both are backed by a comparable volume of ratings — 197 and 107 respectively. Written reviews are what separate them: 5% of Spectrum Analyzer's written reviews are positive against 10% of Sonic Hz Frequency Generator's.

Spectrum Analyzer ships an update fortnightly, Sonic Hz Frequency Generator every 3 months. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Spectrum Analyzer | Sonic Hz Frequency Generator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (197 ratings)](https://appshunter.io/ios/app/spectrum-analyzer-spectrogram/id981810895/reviews) | [4.2 (107 ratings)](https://appshunter.io/ios/app/sonic-hz-frequency-generator/id1603037697/reviews) |
| Number of ratings | **197** | 107 |
| Positive reviews | 5.0% of reviews | **10.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | Freemium | Free with in-app purchases |
| Size | 132 MB | 19 MB |
| Requires iOS | **16.0** | 16.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Music Breath](https://appshunter.io/developer/1140008995) | [汇杭 钟](https://appshunter.io/developer/1481585840) |

## What reviewers say

### Spectrum Analyzer

[App page](https://appshunter.io/ios/app/spectrum-analyzer-spectrogram/id981810895)

Visualize audio frequencies with real-time analysis. Features include a sound level meter, multichannel harmonic analysis, and adjustable graphical representations. Gain insights into your sound environment with advanced tools.

**Highlights:** Sound level meter, Multichannel harmonic analysis, Adjustable graphics, AI-powered sound source analyzer, Real-time analysis, FFT analysis

**Features:** macOS Compatibility

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pitch Finder: Audio Visualizer | $4.99 | per 7 days |
| Pitch Finder: Audio Visualizer | $9.99 | per month |
| One Month Sale | $9.99 | per month |
| 1 Week Subscription | $9.99 | per 7 days |
| 1 Year Sub. with discount | $19.99 | per year |
| 1 Month Subscription | $19.99 | per month |
| 3 Month Subscription | $25.99 | per 3 months |
| 1 Year Subscription | $39.99 | per year |
| 2 months subscription | $39.99 | per 2 months |
| No Ads | $9.99 | one-time |
| Additional Settings Controls | $15.99 | one-time |
| Full Pack + No Ads | $19.99 | one-time |
| Get More | $19.99 | one-time |

**What reviewers like**

- ✅ Accurate frequency identification
- ✅ Clear and easy-to-read display
- ✅ Useful noise floor setup feature
- ✅ Works well when ads are removed

**What reviewers complain about**

- 💰 Extremely aggressive monetization strategy
- 📢 Excessive and intrusive ads
- 🔊 Loud ads that ignore device mute settings
- 🚫 Requires subscription/payment to access core features
- 😤 Deceptive purchase practices and accidental charges

**Reported bugs**

- App becomes unusable after iOS 16 update
- Crashes immediately on iPhone 5 with iOS 7
- Cannot exit app on iPhone X without reboot
- App freezes when changing settings or views
- Inaccurate frequency readings

**Requested features**

- Audio file import functionality
- Customizable background colors for chroma key compatibility
- Ability to record audio instead of only analyzing
- Better documentation and help files
- Improved sensitivity for detecting soft sounds


### 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 Spectrum Analyzer free?

Spectrum Analyzer 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, Spectrum Analyzer or Sonic Hz Frequency Generator?

Spectrum Analyzer and Sonic Hz Frequency Generator are both rated 4.2 out of 5 on the App Store, from 197 and 107 ratings respectively.

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

Both Spectrum Analyzer and Sonic Hz Frequency Generator show ads.

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

Spectrum Analyzer ships an update fortnightly, and Sonic Hz Frequency Generator every 3 months. Most recently, Spectrum Analyzer was updated on September 24, 2026 and Sonic Hz Frequency Generator on September 22, 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.*