# Speed Reader vs shelff

The clearest difference is price: Speed Reader at Free against shelff's $6.99. shelff's advantage is review sentiment (100% vs 60%) and in-app purchases (none vs 9). On update cadence, ads, device support and iOS requirement there is nothing between them.

Speed Reader is free to download; shelff costs $6.99 up front. Speed Reader sells 9 in-app purchases, starting at $4.99 per month. shelff asks for nothing beyond the download.

Speed Reader ships an update every 5 days, shelff every 4 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | Speed Reader | shelff |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| Rating | **[4.1 (13 ratings)](https://appshunter.io/ios/app/speed-reader-rsvp-reader/id6757968737/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 60.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 4 days** |
| Monetization | **Freemium** | Paid |
| Best chart rank | — | **#72** |
| Size | 85 MB | 8 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Amenti Labs LLC](https://appshunter.io/developer/1788668924) | [Satoshi Kojima](https://appshunter.io/developer/1887157382) |

## What reviewers say

### Speed Reader

[App page](https://appshunter.io/ios/app/speed-reader-rsvp-reader/id6757968737)

Enhance your reading speed and comprehension with a scientifically-backed method that presents words one at a time. Import content from various sources, adjust your pace, and track your progress to finish your reading list faster.

**Highlights:** Rapid Serial Visual Presentation (RSVP) technology, Optimal Recognition Point (ORP) highlighting, Adjustable reading speed (100-1000+ WPM), Import from clipboard, URLs, camera, and Share extension, Safari extension for article extraction, Progress tracking and bookmarks

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $4.99 | per month |
| RSVP Reader Weekly | $4.99 | per 7 days |
| Pro Monthly | $4.99 | per month |
| Pro Weekly | $7.99 | per 7 days |
| Pro Yearly Special Offer | $29.99 | per year |
| Pro Yearly | $39.99 | per year |
| Pro Yearly | $59.99 | per year |
| Pro Yearly | $59.99 | per year |
| Pro Lifetime | $119.00 | one-time |


### shelff

[App page](https://appshunter.io/ios/app/shelff-pdf-book-reader/id6760986626)

**Currently charting:** #72 Top Paid · Book (US App Store)

This app provides a dedicated reading experience for PDF documents stored in iCloud. It offers robust organization tools, including folders, tags, and collections, along with a full-text search capability. Users can also manage PDF metadata and highlight content with comments.

**Highlights:** iCloud PDF management, Organize with folders and tags, Full-text search, Highlighting with comments, Metadata editing, Customizable reading layouts

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

**In-app purchases:** none


## Frequently asked questions

### Is Speed Reader free?

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

### Is shelff free?

shelff costs $6.99, with no in-app purchases.

### Do Speed Reader or shelff have ads?

Neither Speed Reader nor shelff shows ads.

### Which is updated more often, Speed Reader or shelff?

Speed Reader ships an update every 5 days, and shelff every 4 days. Most recently, Speed Reader was updated on October 25, 2026 and shelff on October 25, 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.*