# RTA vs Audio Spectrum Analyzer Pro

The clearest difference is price: Audio Spectrum Analyzer Pro at Free against RTA's $4.99. Audio Spectrum Analyzer Pro also leads on rating (4.4 vs 4.0) and ratings volume (239 vs 27). RTA's advantage is chart position (#113 vs unranked) and update cadence (every 3 months vs every 7 months). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

Audio Spectrum Analyzer Pro is free to download; RTA costs $4.99 up front. RTA sells 2 one-off in-app purchases and Audio Spectrum Analyzer Pro sells 2 in-app purchases, starting at $19.99 per year. Whichever you choose, the download price is not the number that matters.

Audio Spectrum Analyzer Pro holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: Audio Spectrum Analyzer Pro has 239 ratings behind it against 27, so its average is the more settled of the two. Written reviews complicate that: 61% of RTA's written reviews are positive against 57% of Audio Spectrum Analyzer Pro's, so the app with the better star average is not the one people write more warmly about.

RTA ships an update every 3 months, Audio Spectrum Analyzer Pro every 7 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | RTA | Audio Spectrum Analyzer Pro |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.0 (27 ratings)](https://appshunter.io/ios/app/rta/id298839433/reviews) | **[4.4 (239 ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer-pro/id1152352806/reviews)** |
| Number of ratings | 27 | **239** |
| Positive reviews | **61.0% of reviews** | 57.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 7 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#113** | — |
| Size | 30 MB | 40 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Smith](https://appshunter.io/developer/291822462) | [Vlad Polyanskiy](https://appshunter.io/developer/438646985) |

## What reviewers say

### RTA

[App page](https://appshunter.io/ios/app/rta/id298839433)

**Currently charting:** #113 Top Paid · Music (US App Store)

Analyze audio frequencies, test speakers, and tune rooms with this professional-grade acoustical analysis tool. It offers octave and 1/3 octave modes, peak hold, and averaging, with automatic microphone compensation for accurate results.

**Highlights:** Real-time acoustical analysis, Octave and 1/3 Octave modes, Peak Hold and Average modes, Automatic microphone compensation, Save, recall, and export graphs, Interactive touch GUI, Noise curve overlays

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| STC -- Transmission Loss | $9.99 | one-time |
| Reference Curve Files | $9.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 👍 Good for quick analysis
- 👍 Accurate for price
- 👍 Useful for tuning
- 👍 Professional tool

**What reviewers complain about**

- 🐛 Crashes frequently
- 🐛 Freezes often
- 🐛 Incompatible with iOS updates
- 🐛 Screen display issues
- 🐛 Battery drain

**Reported bugs**

- App crashes after iOS updates (iOS 13, 15, 16, 17, 18)
- App freezes or crashes on startup
- App only displays half the screen
- App does not save analysis readings to photo roll
- App stops working on older iPads after updates

**Requested features**

- Add German language support
- Add NC and NR curves
- Make background mode optional
- Improve compatibility with newer iOS versions
- Add option to overlay readings


### 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 RTA free?

RTA costs $4.99, and also offers 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, RTA or Audio Spectrum Analyzer Pro?

Audio Spectrum Analyzer Pro is rated higher. RTA averages 4.0 out of 5 from 27 ratings, while Audio Spectrum Analyzer Pro averages 4.4 from 239 ratings.

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

Neither RTA nor Audio Spectrum Analyzer Pro shows ads.

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

RTA ships an update every 3 months, and Audio Spectrum Analyzer Pro every 7 months. Most recently, RTA was updated on October 24, 2026 and Audio Spectrum Analyzer Pro on October 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.*