# Audio Spectrum Analyzer Pro vs KRK Audio Tools

The clearest difference is in-app purchases: KRK Audio Tools at none against Audio Spectrum Analyzer Pro's 2. KRK Audio Tools also leads on iOS requirement (9.3 vs 13.0). Audio Spectrum Analyzer Pro's advantage is rating (4.4 vs 4.1) and ratings volume (238 vs 40). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Audio Spectrum Analyzer Pro sells 2 in-app purchases, starting at $19.99 per year. KRK Audio Tools asks for nothing beyond the download.

Audio Spectrum Analyzer Pro holds the better App Store score, 4.4 against 4.1. That said, the two scores are not equally well evidenced: Audio Spectrum Analyzer Pro has 238 ratings behind it against 40, so its average is the more settled of the two. Written reviews point the same way: 57% of Audio Spectrum Analyzer Pro's written reviews are positive against 54% of KRK Audio Tools's.

## The numbers

| Metric | Audio Spectrum Analyzer Pro | KRK Audio Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (238 ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer-pro/id1152352806/reviews)** | [4.1 (40 ratings)](https://appshunter.io/ios/app/krk-audio-tools/id1453700300/reviews) |
| Number of ratings | **238** | 40 |
| Positive reviews | **57.4% of reviews** | 54.2% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | — |
| Monetization | Free with in-app purchases | **Free** |
| Size | 40 MB | 10 MB |
| Requires iOS | 13.0 | **9.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vlad Polyanskiy](https://appshunter.io/developer/438646985) | [KRK Systems, Inc.](https://appshunter.io/developer/1453700299) |

## What reviewers say

### 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


### KRK Audio Tools

[App page](https://appshunter.io/ios/app/krk-audio-tools/id1453700300)

This application offers a suite of professional tools designed to optimize your studio monitor setup. It includes features for real-time frequency analysis, level calibration, EQ recommendations, and precise monitor alignment for an enhanced listening experience.

**Highlights:** Spectrum RTA for real-time frequency analysis, Level Meter for monitor calibration, EQ Recommendation for room optimization, Monitor Align for precise angle adjustment, Delay tool for multi-monitor time alignment, Polarity tool for wiring verification, Signal generator (sine, white, pink noise)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Audio Spectrum Analyzer Pro free?

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

### Is KRK Audio Tools free?

KRK Audio Tools is free to download, with no in-app purchases.

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

Audio Spectrum Analyzer Pro is rated higher. Audio Spectrum Analyzer Pro averages 4.4 out of 5 from 238 ratings, while KRK Audio Tools averages 4.1 from 40 ratings.

### Do Audio Spectrum Analyzer Pro or KRK Audio Tools have ads?

Neither Audio Spectrum Analyzer Pro nor KRK Audio Tools shows ads.

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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.*