# Spine vs Unshelf

The clearest difference is device support: Spine at 3 against Unshelf's 1. On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Spine | Unshelf |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/unshelf-read-more-naturally/id6775682429/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 5 weeks |
| Monetization | — | Free |
| Size | 2 MB | 10 MB |
| Requires iOS | 26.0 | 26.0 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Thought Tides LLC](https://appshunter.io/developer/1677066161) | [ANTHONY J LUSARDI](https://appshunter.io/developer/6775682431) |

## What reviewers say

### Spine

[App page](https://appshunter.io/ios/app/spine-chapter-reader/id6757416958)

**Features:** Vision Pro support

**In-app purchases:** none


### Unshelf

[App page](https://appshunter.io/ios/app/unshelf-read-more-naturally/id6775682429)

This app uses Rapid Serial Visual Presentation (RSVP) to display words one at a time, helping you read faster and lose your place less often. It offers customizable settings for speed, display, and fonts, along with progress tracking and a catalog of books.

**Highlights:** RSVP reading mode, Adjustable reading speed (WPM), Customizable word display, Page view option, Catalog of 1,400+ books, Progress tracking, Multiple font options including OpenDyslexic

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

**In-app purchases:** none


## Frequently asked questions

### Is Spine free?

Spine is free to download, with no in-app purchases.

### Is Unshelf free?

Unshelf is free to download, with no in-app purchases.

### Do Spine or Unshelf have ads?

Neither Spine nor Unshelf shows ads.

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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.*