# HTMLCollection vs SpectralScan Audio Analyzer

The clearest difference is update cadence: SpectralScan Audio Analyzer at every 8 days against HTMLCollection's every 4 months. SpectralScan Audio Analyzer also leads on iOS requirement (15.0 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. HTMLCollection sells 1 one-off in-app purchase and SpectralScan Audio Analyzer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

HTMLCollection ships an update every 4 months, SpectralScan Audio Analyzer every 8 days. The most recent releases landed on September 15, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | HTMLCollection | SpectralScan Audio Analyzer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (9 ratings)](https://appshunter.io/ios/app/spectralscan-audio-analyzer/id6762024331/reviews)** |
| Number of ratings | — | **9** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Size | 5 MB | 16 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shigeki Karouji](https://appshunter.io/developer/975941302) | [Otsukare AB](https://appshunter.io/developer/1892516192) |

## What reviewers say

### HTMLCollection

[App page](https://appshunter.io/ios/app/htmlcollection/id6756459786)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| History Plus: Extended History | $0.49 | one-time |


### SpectralScan Audio Analyzer

[App page](https://appshunter.io/ios/app/spectralscan-audio-analyzer/id6762024331)

Transform your device into a professional audio analysis tool. Visualize sound in real-time with a high-resolution spectrum, perform precise sine sweep measurements, and analyze frequency content over time. Save, compare, and export your audio data.

**Highlights:** Real-time frequency spectrum visualization, Sine sweep measurements for system response, Spectrogram for time-frequency analysis, Comparison and overlay of multiple measurements, Export data as CSV or PNG, Pro features for advanced analysis

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SpectralScan Pro | $9.99 | one-time |


## Frequently asked questions

### Is HTMLCollection free?

HTMLCollection is free to download, with in-app purchases available.

### Is SpectralScan Audio Analyzer free?

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

### Do HTMLCollection or SpectralScan Audio Analyzer have ads?

Neither HTMLCollection nor SpectralScan Audio Analyzer shows ads.

### Which is updated more often, HTMLCollection or SpectralScan Audio Analyzer?

HTMLCollection ships an update every 4 months, and SpectralScan Audio Analyzer every 8 days. Most recently, HTMLCollection was updated on September 15, 2026 and SpectralScan Audio Analyzer on September 27, 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.*