# DriveRack PA2 Control vs Audio / Spectrum Analyzer

The clearest difference is review sentiment: Audio / Spectrum Analyzer at 79% against DriveRack PA2 Control's 34%. Audio / Spectrum Analyzer also leads on rating (4.6 vs 3.2) and update cadence (every 2 weeks vs every 8 months). DriveRack PA2 Control's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Audio / Spectrum Analyzer sells 1 one-off in-app purchase. DriveRack PA2 Control asks for nothing beyond the download.

Audio / Spectrum Analyzer holds the better App Store score, 4.6 against 3.2. That said, the two scores are not equally well evidenced: Audio / Spectrum Analyzer has 1K ratings behind it against 108, so its average is the more settled of the two. Written reviews point the same way: 34% of DriveRack PA2 Control's written reviews are positive against 79% of Audio / Spectrum Analyzer's.

DriveRack PA2 Control ships an update every 8 months, Audio / Spectrum Analyzer every 2 weeks. The most recent releases landed on October 13, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | DriveRack PA2 Control | Audio / Spectrum Analyzer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.2 (108 ratings)](https://appshunter.io/ios/app/driverack-pa2-control/id817149833/reviews) | **[4.6 (1K ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer/id1508848574/reviews)** |
| Number of ratings | 108 | **1K** |
| Positive reviews | 34.0% of reviews | **78.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 67 MB | 5 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [Harman Professional, Inc.](https://appshunter.io/developer/410104207) | [Loop-Sessions.LLC.](https://appshunter.io/developer/414215366) |

## What reviewers say

### DriveRack PA2 Control

[App page](https://appshunter.io/ios/app/driverack-pa2-control/id817149833)

Control your PA2 hardware wirelessly from any location. This app optimizes and protects your loudspeakers by managing audio processing between your mixer and amplifiers.

**Highlights:** Wireless control via WiFi, System setup from any location, Loudspeaker optimization, Loudspeaker protection, Audio processing management

**In-app purchases:** none


### Audio / Spectrum Analyzer

[App page](https://appshunter.io/ios/app/audio-spectrum-analyzer/id1508848574)

This application analyzes audio input from your microphone, displaying both the waveform and amplitude spectrum in real-time. It offers extensive customization for display, calculation, and signal generation.

**Highlights:** Simultaneous waveform and spectrum display, Configurable display layouts, Selectable FFT size and averaging, Frequency weighting options (Flat, dBA, dBC), Octave band analysis, Audio signal and noise generation, Peak hold and pitch meter

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Remove ads, High-Res analysis) | $11.99 | one-time |

**What reviewers like**

- 👍 Customizable features
- ⚙️ Accurate measurements
- 🚀 Helpful for troubleshooting
- 💡 Useful for ghost hunting

**What reviewers complain about**

- 🐛 Crashes and freezes
- 🔋 High battery and CPU usage
- 🚫 Inappropriate ads/content
- 🔒 Security concerns with payment info

**Reported bugs**

- Stuck on latest measurement
- White noise instead of expected functionality
- Disconnects AirPods

**Requested features**

- Sampling rate adjustment
- Wave shape tracking
- Audio file analysis
- Octave analysis


## Frequently asked questions

### Is DriveRack PA2 Control free?

DriveRack PA2 Control is free to download, with no in-app purchases.

### Is Audio / Spectrum Analyzer free?

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

### Which has better reviews, DriveRack PA2 Control or Audio / Spectrum Analyzer?

Audio / Spectrum Analyzer is rated higher. DriveRack PA2 Control averages 3.2 out of 5 from 108 ratings, while Audio / Spectrum Analyzer averages 4.6 from 1K ratings.

### Do DriveRack PA2 Control or Audio / Spectrum Analyzer have ads?

Audio / Spectrum Analyzer shows ads; DriveRack PA2 Control does not.

### Which is updated more often, DriveRack PA2 Control or Audio / Spectrum Analyzer?

DriveRack PA2 Control ships an update every 8 months, and Audio / Spectrum Analyzer every 2 weeks. Most recently, DriveRack PA2 Control was updated on October 13, 2026 and Audio / Spectrum Analyzer on October 17, 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.*