# Spectre vs Audio Spectrum Analyzer Pro

The clearest difference is price: Audio Spectrum Analyzer Pro at Free against Spectre's $0.99. Audio Spectrum Analyzer Pro also leads on rating (4.4 vs 3.0) and update cadence (every 7 months vs every 96 months). Spectre's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.

Audio Spectrum Analyzer Pro is free to download; Spectre costs $0.99 up front. Audio Spectrum Analyzer Pro sells 2 in-app purchases, starting at $19.99 per year. Spectre asks for nothing beyond the download.

Audio Spectrum Analyzer Pro holds the better App Store score, 4.4 against 3.0. That said, the two scores are not equally well evidenced: Audio Spectrum Analyzer Pro has 238 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 40% of Spectre's written reviews are positive against 57% of Audio Spectrum Analyzer Pro's.

Spectre ships an update every 96 months, Audio Spectrum Analyzer Pro every 7 months. The most recent releases landed on September 6, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Spectre | Audio Spectrum Analyzer Pro |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/spectre/id913027939/reviews) | **[4.4 (238 ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer-pro/id1152352806/reviews)** |
| Number of ratings | 2 | **238** |
| Positive reviews | 40.0% of reviews | **57.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 96 months | **Every 7 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 46 MB | 40 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Hand](https://appshunter.io/developer/854186096) | [Vlad Polyanskiy](https://appshunter.io/developer/438646985) |

## What reviewers say

### Spectre

[App page](https://appshunter.io/ios/app/spectre/id913027939)

This audio analysis utility provides real-time FFT and oscilloscope views for sound input. Customize waveform display, control sample rates, and zoom in for detailed analysis on iOS devices.

**Highlights:** FFT Analysis, Oscilloscope, Customizable Waveform, Linear & Logarithmic Forms, Pause/Play Controls, Zoom Functionality

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Spectre free?

Spectre costs $0.99, with no in-app purchases.

### Is Audio Spectrum Analyzer Pro free?

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

### Which has better reviews, Spectre or Audio Spectrum Analyzer Pro?

Audio Spectrum Analyzer Pro is rated higher. Spectre averages 3.0 out of 5 from 2 ratings, while Audio Spectrum Analyzer Pro averages 4.4 from 238 ratings.

### Do Spectre or Audio Spectrum Analyzer Pro have ads?

Neither Spectre nor Audio Spectrum Analyzer Pro shows ads.

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

Spectre ships an update every 96 months, and Audio Spectrum Analyzer Pro every 7 months. Most recently, Spectre was updated on September 6, 2026 and Audio Spectrum Analyzer Pro on September 24, 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.*