# Spectrum Analyzer vs Qu

The clearest difference is rating: Spectrum Analyzer at 4.2 against Qu's 2.4. Spectrum Analyzer also leads on update cadence (fortnightly vs every 47 months) and ratings volume (197 vs 8). Qu's advantage is in-app purchases (none vs 13) and ads (none vs shown). On price, review sentiment, device support and iOS requirement there is nothing between them.

Both are free to download. Spectrum Analyzer sells 13 in-app purchases, starting at $4.99 per 7 days. Qu asks for nothing beyond the download.

Spectrum Analyzer holds the better App Store score, 4.2 against 2.4. That said, the two scores are not equally well evidenced: Spectrum Analyzer has 197 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 5% of Spectrum Analyzer's written reviews are positive against 0% of Qu's.

Spectrum Analyzer ships an update fortnightly, Qu every 47 months. The most recent releases landed on September 24, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Spectrum Analyzer | Qu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (197 ratings)](https://appshunter.io/ios/app/spectrum-analyzer-spectrogram/id981810895/reviews)** | [2.4 (8 ratings)](https://appshunter.io/ios/app/qu-control/id1059366059/reviews) |
| Number of ratings | **197** | 8 |
| Positive reviews | **5.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 47 months |
| Monetization | Freemium | **Free** |
| Size | 132 MB | 2 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Music Breath](https://appshunter.io/developer/1140008995) | [Allen & Heath Limited](https://appshunter.io/developer/381710975) |

## 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


### Qu

[App page](https://appshunter.io/ios/app/qu-control/id1059366059)

This app offers wireless mobile control for specific digital mixing consoles. It allows non-technical users to adjust essential parameters like levels and mutes, simplifying audio management for various applications.

**Highlights:** Wireless control for Qu mixers, Adjust input and master faders, Control mutes and mute groups, Manage send and group levels, Configure softkeys, Simultaneous iOS device support

**Features:** 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 Qu free?

Qu is free to download, with no in-app purchases.

### Which has better reviews, Spectrum Analyzer or Qu?

Spectrum Analyzer is rated higher. Spectrum Analyzer averages 4.2 out of 5 from 197 ratings, while Qu averages 2.4 from 8 ratings.

### Do Spectrum Analyzer or Qu have ads?

Spectrum Analyzer shows ads; Qu does not.

### Which is updated more often, Spectrum Analyzer or Qu?

Spectrum Analyzer ships an update fortnightly, and Qu every 47 months. Most recently, Spectrum Analyzer was updated on September 24, 2026 and Qu on September 19, 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.*