# Spectrum Analyzer vs Chladni Screen

The clearest difference is price: Spectrum Analyzer at Free against Chladni Screen's $1.99. Spectrum Analyzer also leads on update cadence (fortnightly vs every 8 months). Chladni Screen's advantage is review sentiment (49% vs 5%) and in-app purchases (none vs 13). On ratings volume, device support and iOS requirement there is nothing between them.

Spectrum Analyzer is free to download; Chladni Screen costs $1.99 up front. Spectrum Analyzer sells 13 in-app purchases, starting at $4.99 per 7 days. Chladni Screen asks for nothing beyond the download.

Chladni Screen holds the better App Store score, 4.6 against 4.2. Both are backed by a comparable volume of ratings — 199 and 81 respectively. Written reviews point the same way: 5% of Spectrum Analyzer's written reviews are positive against 49% of Chladni Screen's.

Spectrum Analyzer ships an update fortnightly, Chladni Screen every 8 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Spectrum Analyzer | Chladni Screen |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.2 (199 ratings)](https://appshunter.io/ios/app/spectrum-analyzer-spectrogram/id981810895/reviews) | **[4.6 (81 ratings)](https://appshunter.io/ios/app/chladni-screen/id1385177377/reviews)** |
| Number of ratings | **199** | 81 |
| Positive reviews | 5.0% of reviews | **48.6% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 8 months |
| Monetization | Freemium | **Free** |
| Size | 100 MB | 1 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Music Breath](https://appshunter.io/developer/1140008995) | [Narumi Inada](https://appshunter.io/developer/1347729163) |

## 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


### Chladni Screen

[App page](https://appshunter.io/ios/app/chladni-screen/id1385177377)

Explore the mesmerizing patterns created by sound vibrations on a digital surface. This app simulates Chladni figures, visualizing how different sounds, including your voice and instruments, create intricate geometric shapes.

**Highlights:** Simulates Chladni figures digitally, Visualizes sound vibrations, Uses voice and instruments as sound sources, Displays geometric patterns, Offers multiple display modes

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

**In-app purchases:** none


## Frequently asked questions

### Is Spectrum Analyzer free?

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

### Is Chladni Screen free?

Chladni Screen costs $1.99, with no in-app purchases.

### Which has better reviews, Spectrum Analyzer or Chladni Screen?

Chladni Screen is rated higher. Spectrum Analyzer averages 4.2 out of 5 from 199 ratings, while Chladni Screen averages 4.6 from 81 ratings.

### Do Spectrum Analyzer or Chladni Screen have ads?

Spectrum Analyzer shows ads; Chladni Screen does not.

### Which is updated more often, Spectrum Analyzer or Chladni Screen?

Spectrum Analyzer ships an update fortnightly, and Chladni Screen every 8 months. Most recently, Spectrum Analyzer was updated on October 26, 2026 and Chladni Screen on October 25, 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.*