# Audio Spectrum Analyzer Pro vs STETSOM DSPLAYER AMPLIFIER

The clearest difference is in-app purchases: STETSOM DSPLAYER AMPLIFIER at none against Audio Spectrum Analyzer Pro's 2. STETSOM DSPLAYER AMPLIFIER also leads on update cadence (every 3 weeks vs every 7 months). Audio Spectrum Analyzer Pro's advantage is review sentiment (57% vs 24%). On price, ads, device support and iOS requirement 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. STETSOM DSPLAYER AMPLIFIER asks for nothing beyond the download.

Audio Spectrum Analyzer Pro ships an update every 7 months, STETSOM DSPLAYER AMPLIFIER every 3 weeks. Both last shipped on October 20, 2026.

## The numbers

| Metric | Audio Spectrum Analyzer Pro | STETSOM DSPLAYER AMPLIFIER |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (239 ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer-pro/id1152352806/reviews)** | — |
| Number of ratings | **239** | — |
| Positive reviews | **57.4% of reviews** | 24.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 40 MB | 60 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vlad Polyanskiy](https://appshunter.io/developer/438646985) | [STETSOM ELETRÔNICA LTDA](https://appshunter.io/developer/1110480569) |

## 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


### STETSOM DSPLAYER AMPLIFIER

[App page](https://appshunter.io/ios/app/stetsom-dsplayer-amplifier/id6499367116)

This application provides comprehensive control over professional audio adjustments for car and speaker installations. It supports various input methods including RCA, optical, USB, and Bluetooth, along with FM radio functionality. Fine-tune audio settings like equalization, phase, and delay for optimal sound.

**Highlights:** RCA and WIRE audio input, High-fidelity optical audio input, USB and Bluetooth music playback, FM radio with favorites, Digital audio output, Equalization, Level, Phase, Delay adjustments, Quick setup modes for car/speaker

**Features:** macOS Compatibility, 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 STETSOM DSPLAYER AMPLIFIER free?

STETSOM DSPLAYER AMPLIFIER is free to download, with no in-app purchases.

### Do Audio Spectrum Analyzer Pro or STETSOM DSPLAYER AMPLIFIER have ads?

Neither Audio Spectrum Analyzer Pro nor STETSOM DSPLAYER AMPLIFIER shows ads.

### Which is updated more often, Audio Spectrum Analyzer Pro or STETSOM DSPLAYER AMPLIFIER?

Audio Spectrum Analyzer Pro ships an update every 7 months, and STETSOM DSPLAYER AMPLIFIER every 3 weeks. Most recently, Audio Spectrum Analyzer Pro was updated on October 20, 2026 and STETSOM DSPLAYER AMPLIFIER on October 20, 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.*