# SPL vs Audio Spectrum Analyzer dB RTA

The clearest difference is price: Audio Spectrum Analyzer dB RTA at Free against SPL's $8.99. Audio Spectrum Analyzer dB RTA also leads on rating (4.5 vs 3.0) and ratings volume (3K vs 4). SPL's advantage is in-app purchases (none vs 2) and review sentiment (68% vs 44%). On update cadence, ads, device support and iOS requirement there is nothing between them.

Audio Spectrum Analyzer dB RTA is free to download; SPL costs $8.99 up front. Audio Spectrum Analyzer dB RTA sells 2 in-app purchases, starting at $1.99 per month. SPL asks for nothing beyond the download.

Audio Spectrum Analyzer dB RTA holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: Audio Spectrum Analyzer dB RTA has 3K ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 68% of SPL's written reviews are positive against 44% of Audio Spectrum Analyzer dB RTA's, so the app with the better star average is not the one people write more warmly about.

SPL ships an update every 6 months, Audio Spectrum Analyzer dB RTA every 5 months. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | SPL | Audio Spectrum Analyzer dB RTA |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | [3.0 (4 ratings)](https://appshunter.io/ios/app/spl/id293573990/reviews) | **[4.5 (3K ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer-db-rta/id1281873790/reviews)** |
| Number of ratings | 4 | **3K** |
| Positive reviews | **67.6% of reviews** | 43.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 30 MB | 24 MB |
| Requires iOS | 15.0 | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Smith](https://appshunter.io/developer/291822462) | [Marina Polyanskaya](https://appshunter.io/developer/1519482916) |

## What reviewers say

### SPL

[App page](https://appshunter.io/ios/app/spl/id293573990)

This professional-grade digital sound level meter measures decibels with advanced modes and filters meeting ANSI Type 1 standards. It allows storing, exporting, and calibrating measurements, and can be used with external calibrated microphones for precise results.

**Highlights:** Professional-grade digital sound level meter, ANSI/IEC Type 1 standards compliant filters and modes, Store, recall, and export GPS/time-stamped results, Supports external calibrated microphones, Adjustable calibration for accuracy, Internal mic compensation filter

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

**In-app purchases:** none


### Audio Spectrum Analyzer dB RTA

[App page](https://appshunter.io/ios/app/audio-spectrum-analyzer-db-rta/id1281873790)

Analyze sound frequencies and decibel levels with this advanced tool. Ideal for tuning audio systems, it offers real-time spectrum analysis and sound metering for various applications.

**Highlights:** Octave Band Real-Time Analyzer, FFT Plot - Fast Fourier Transform, Integrated Sound Level Meter (dB-A), Multispectral Harmonic Analyzer, Hold Max and Min Peaks, Various Window Functions

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $1.99 | per month |
| Spectrum Analyzer Pro | $7.99 | one-time |

**What reviewers like**

- 🚀 Excellent audio analysis tool
- 👍 Clean and intuitive interface
- 💡 Customizable frequency range
- 🔍 Accurate real-time spectrum visualization

**What reviewers complain about**

- 🐛 Compatibility issues with newer iOS versions
- 🔁 Constant prompts to upgrade to Pro version
- 🔌 High battery consumption
- 📊 Inaccurate frequency tracking in some modes

**Reported bugs**

- Freezing and crashing on certain devices
- Incorrect frequency readings in Octave RTA mode
- Inability to switch between microphone sources

**Requested features**

- External microphone support
- Ability to save and compare measurement results
- More detailed instructions and tutorials
- Vertical orientation option


## Frequently asked questions

### Is SPL free?

SPL costs $8.99, with no in-app purchases.

### Is Audio Spectrum Analyzer dB RTA free?

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

### Which has better reviews, SPL or Audio Spectrum Analyzer dB RTA?

Audio Spectrum Analyzer dB RTA is rated higher. SPL averages 3.0 out of 5 from 4 ratings, while Audio Spectrum Analyzer dB RTA averages 4.5 from 3K ratings.

### Do SPL or Audio Spectrum Analyzer dB RTA have ads?

Neither SPL nor Audio Spectrum Analyzer dB RTA shows ads.

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

SPL ships an update every 6 months, and Audio Spectrum Analyzer dB RTA every 5 months. Most recently, SPL was updated on October 23, 2026 and Audio Spectrum Analyzer dB RTA on October 22, 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.*