# Ultrasonic Analyzer vs Audio Spectrum Analyzer Pro

The clearest difference is price: Audio Spectrum Analyzer Pro at Free against Ultrasonic Analyzer's $19.99. Audio Spectrum Analyzer Pro also leads on rating (4.4 vs 3.9) and ratings volume (239 vs 35). Ultrasonic Analyzer's advantage is in-app purchases (none vs 2). On review sentiment, update cadence, ads and device support there is nothing between them.

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

Audio Spectrum Analyzer Pro holds the better App Store score, 4.4 against 3.9. That said, the two scores are not equally well evidenced: Audio Spectrum Analyzer Pro has 239 ratings behind it against 35, so its average is the more settled of the two. Written reviews point the same way: 56% of Ultrasonic Analyzer's written reviews are positive against 57% of Audio Spectrum Analyzer Pro's.

Ultrasonic Analyzer ships an update every 4 months, Audio Spectrum Analyzer Pro every 7 months. Both last shipped on October 26, 2026.

## The numbers

| Metric | Ultrasonic Analyzer | Audio Spectrum Analyzer Pro |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | [3.9 (35 ratings)](https://appshunter.io/ios/app/ultrasonic-analyzer/id851069926/reviews) | **[4.4 (239 ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer-pro/id1152352806/reviews)** |
| Number of ratings | 35 | **239** |
| Positive reviews | 55.9% of reviews | **57.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 7 months |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 40 MB |
| Requires iOS | **12.4** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DEXUS Pawel Krzywdzinski](https://appshunter.io/developer/377798036) | [Vlad Polyanskiy](https://appshunter.io/developer/438646985) |

## What reviewers say

### Ultrasonic Analyzer

[App page](https://appshunter.io/ios/app/ultrasonic-analyzer/id851069926)

This app provides real-time audio analysis with visual representations of sound frequencies. It allows users to listen to and analyze ultrasounds, with options for transposed playback and slowed-down analysis of inaudible sounds. It supports various sampling rates and offers detailed charting and measurement tools.

**Highlights:** Real-time spectrum analysis, Spectrogram and oscilloscope views, Octave RTA analyzer, Transposed ultrasound listening, Slowed-down playback, High sampling rates up to 384kHz, Zoom and pan capabilities

**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 Ultrasonic Analyzer free?

Ultrasonic Analyzer costs $19.99, 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, Ultrasonic Analyzer or Audio Spectrum Analyzer Pro?

Audio Spectrum Analyzer Pro is rated higher. Ultrasonic Analyzer averages 3.9 out of 5 from 35 ratings, while Audio Spectrum Analyzer Pro averages 4.4 from 239 ratings.

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

Neither Ultrasonic Analyzer nor Audio Spectrum Analyzer Pro shows ads.

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

Ultrasonic Analyzer ships an update every 4 months, and Audio Spectrum Analyzer Pro every 7 months. Most recently, Ultrasonic Analyzer was updated on October 26, 2026 and Audio Spectrum Analyzer Pro on October 26, 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.*