# Harmonic Violin Tuner vs Audio / Spectrum Analyzer

The clearest difference is price: Audio / Spectrum Analyzer at Free against Harmonic Violin Tuner's $2.99. Audio / Spectrum Analyzer also leads on update cadence (every 2 weeks vs every 38 months). Harmonic Violin Tuner's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Audio / Spectrum Analyzer is free to download; Harmonic Violin Tuner costs $2.99 up front. Audio / Spectrum Analyzer sells 1 one-off in-app purchase. Harmonic Violin Tuner asks for nothing beyond the download.

Harmonic Violin Tuner ships an update every 38 months, Audio / Spectrum Analyzer every 2 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | Harmonic Violin Tuner | Audio / Spectrum Analyzer |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[4.6 (1.1K ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer/id1508848574/reviews)** |
| Number of ratings | — | **1.1K** |
| Positive reviews | — | 78.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 38 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 28 MB | 5 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Artificial Intelligence Technologies J.K. Oy](https://appshunter.io/developer/1050973715) | [Loop-Sessions.LLC.](https://appshunter.io/developer/414215366) |

## What reviewers say

### Harmonic Violin Tuner

[App page](https://appshunter.io/ios/app/harmonic-violin-tuner/id1465154180)

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

**In-app purchases:** none


### Audio / Spectrum Analyzer

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

Analyze audio signals in real-time with waveform, amplitude spectrum, and spectrogram displays. Offers detailed customization for FFT size, window functions, and frequency weighting. Includes tools for generating basic waveforms and measurement signals.

**Highlights:** Simultaneous Waveform, Spectrum, Spectrogram display, Customizable FFT size and window functions, Frequency weighting (Flat, dBA, dBC), Octave analysis, Basic waveform and measurement signal generation, Peak hold and spectrum tilt

**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 Harmonic Violin Tuner free?

Harmonic Violin Tuner costs $2.99, with no in-app purchases.

### Is Audio / Spectrum Analyzer free?

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

### Do Harmonic Violin Tuner or Audio / Spectrum Analyzer have ads?

Audio / Spectrum Analyzer shows ads; Harmonic Violin Tuner does not.

### Which is updated more often, Harmonic Violin Tuner or Audio / Spectrum Analyzer?

Harmonic Violin Tuner ships an update every 38 months, and Audio / Spectrum Analyzer every 2 weeks. Most recently, Harmonic Violin Tuner was updated on November 3, 2026 and Audio / Spectrum Analyzer on November 3, 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.*