# PDF Reader Auto Scroll vs Soniclyze

The clearest difference is price: Soniclyze at Free against PDF Reader Auto Scroll's $9.99. Soniclyze also leads on rating (5.0 vs 4.5). PDF Reader Auto Scroll's advantage is in-app purchases (none vs 4) and iOS requirement (13.0 vs 18.0). On review sentiment, ratings volume, update cadence and ads there is nothing between them.

Soniclyze is free to download; PDF Reader Auto Scroll costs $9.99 up front. Soniclyze sells 4 in-app purchases, starting at $4.99 per month. PDF Reader Auto Scroll asks for nothing beyond the download.

Soniclyze holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

PDF Reader Auto Scroll ships an update every 5 days, Soniclyze every 10 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PDF Reader Auto Scroll | Soniclyze |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/pdf-reader-auto-scroll/id6736847843/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/soniclyze-spl-and-rta-meter/id6758894556/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 10 days |
| Monetization | Paid | **Freemium** |
| Size | 1 MB | 42 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Abdulkarim Nasir](https://appshunter.io/developer/1463436050) | [雄伟 赵](https://appshunter.io/developer/1779874120) |

## What reviewers say

### PDF Reader Auto Scroll

[App page](https://appshunter.io/ios/app/pdf-reader-auto-scroll/id6736847843)

This utility app offers hands-free reading of PDF documents with customizable automatic page scrolling. It allows users to manage files, adjust scroll speed and direction, and maintain reading progress without manual interaction.

**Highlights:** Automatic page scrolling, Adjustable scroll speed and direction, Hands-free reading, PDF file management, Night mode, Resume reading progress

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

**In-app purchases:** none


### Soniclyze

[App page](https://appshunter.io/ios/app/soniclyze-spl-and-rta-meter/id6758894556)

Transform your device into a professional sound measurement toolkit. Analyze audio files, measure sound levels, and inspect frequency responses with advanced algorithms. Offers free core features and a Pro version for expanded capabilities and reporting.

**Highlights:** Real-time spectrum analysis (FFT), Sound level metering (SPL), Audio file analysis, Feedback detection, Loudness and true-peak analysis, Signal generator, Report export (Pro)

**Features:** iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Professional Monthly | $4.99 | per month |
| Professional Yearly | $49.99 | per year |
| Enterprise Monthly | $199.99 | per month |
| Enterprise Yearly | $999.99 | per year |


## Frequently asked questions

### Is PDF Reader Auto Scroll free?

PDF Reader Auto Scroll costs $9.99, with no in-app purchases.

### Is Soniclyze free?

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

### Which has better reviews, PDF Reader Auto Scroll or Soniclyze?

Soniclyze is rated higher. PDF Reader Auto Scroll averages 4.5 out of 5 from 2 ratings, while Soniclyze averages 5.0 from 1 ratings.

### Do PDF Reader Auto Scroll or Soniclyze have ads?

Neither PDF Reader Auto Scroll nor Soniclyze shows ads.

### Which is updated more often, PDF Reader Auto Scroll or Soniclyze?

PDF Reader Auto Scroll ships an update every 5 days, and Soniclyze every 10 days. Most recently, PDF Reader Auto Scroll was updated on November 4, 2026 and Soniclyze on October 31, 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.*