# Houji vs PDF AutoScroll

The clearest difference is update cadence: PDF AutoScroll at every 2 weeks against Houji's every 7 months. PDF AutoScroll also leads on chart position (#189 vs unranked) and device support (3 vs 1). Houji's advantage is price ($1.99 vs $4.99). On ads, in-app purchases and iOS requirement there is nothing between them.

Houji costs $1.99 and PDF AutoScroll $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Houji ships an update every 7 months, PDF AutoScroll every 2 weeks. The most recent releases landed on September 22, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Houji | PDF AutoScroll |
| --- | --- | --- |
| Price | **$1.99** | $4.99 |
| Rating | — | **[4.2 (6 ratings)](https://appshunter.io/ios/app/pdf-autoscroll/id6743747935/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Monetization | — | Paid |
| Best chart rank | — | **#189** |
| Size | 4 MB | 3 MB |
| Requires iOS | **16.1** | 16.6 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [her0.jp](https://appshunter.io/developer/482918302) | [Paran](https://appshunter.io/developer/1698510581) |

## What reviewers say

### Houji

[App page](https://appshunter.io/ios/app/houji/id482918299)

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

**In-app purchases:** none


### PDF AutoScroll

[App page](https://appshunter.io/ios/app/pdf-autoscroll/id6743747935)

**Currently charting:** #189 Top Paid · Productivity (US App Store)

Effortlessly read long documents, papers, or sheet music with smooth, hands-free auto-scrolling. This PDF viewer enhances focus by eliminating manual page turns and offers features like dark mode, highlighting, and quick navigation.

**Highlights:** Smooth auto-scrolling with speed control, Dark mode for comfortable reading, Highlighting and instant jump to highlights, Table of contents for quick navigation, Search functionality, Bookmarks and automatic last-position restore, Recent PDF reopening

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Houji free?

Houji costs $1.99, with no in-app purchases.

### Is PDF AutoScroll free?

PDF AutoScroll costs $4.99, with no in-app purchases.

### Do Houji or PDF AutoScroll have ads?

Neither Houji nor PDF AutoScroll shows ads.

### Which is updated more often, Houji or PDF AutoScroll?

Houji ships an update every 7 months, and PDF AutoScroll every 2 weeks. Most recently, Houji was updated on September 22, 2026 and PDF AutoScroll on September 10, 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.*