# Book.io vs Reader by Sol

The clearest difference is review sentiment: Book.io at 97% against Reader by Sol's 0%. Book.io also leads on rating (4.8 vs 4.1) and in-app purchases (none vs 18). Reader by Sol's advantage is update cadence (fortnightly vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Reader by Sol sells 18 in-app purchases, starting at $14.99 per month. Book.io asks for nothing beyond the download.

Book.io holds the better App Store score, 4.8 against 4.1. Both are backed by a comparable volume of ratings — 57 and 13 respectively. Written reviews point the same way: 97% of Book.io's written reviews are positive against 0% of Reader by Sol's.

Book.io ships an update every 2 months, Reader by Sol fortnightly. The most recent releases landed on October 6, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Book.io | Reader by Sol |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (57 ratings)](https://appshunter.io/ios/app/bookio/id1661003233/reviews)** | [4.1 (13 ratings)](https://appshunter.io/ios/app/reader-by-sol/id6443714688/reviews) |
| Number of ratings | **57** | 13 |
| Positive reviews | **96.7% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 31 MB | 97 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Book.io, Inc](https://appshunter.io/developer/1661003235) | [Sindarin, Inc.](https://appshunter.io/developer/1565695400) |

## What reviewers say

### Book.io

[App page](https://appshunter.io/ios/app/bookio/id1661003233)

Manage your digital library of eBooks and audiobooks with a user-friendly interface. Customize your reading experience with various themes and text settings, and enjoy features like bookmarking and embedded media. Own and control your digital content.

**Highlights:** eBook and Audiobook management, Customizable themes and text settings, Seamless navigation and bookmarking, Audiobook playback and reading/listening switch, Embedded video and fixed format support, Social media login

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

**In-app purchases:** none


### Reader by Sol

[App page](https://appshunter.io/ios/app/reader-by-sol/id6443714688)

This app delivers new books, articles, and newsletters to your digital library. It also allows you to archive content and access settings, accounts, and support in a centralized location.

**Highlights:** Content delivery, Book archiving, Article management, Newsletter access, Settings hub, Account management, Tech support access

**In-app purchases (18)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Beta Book Club | $14.99 | per month |
| $0.99 | $0.99 | one-time |
| $1.99 | $1.99 | one-time |
| Sol Catalog Book | $1.99 | one-time |
| $3.99 | $3.99 | one-time |
| $5.99 | $5.99 | one-time |
| $6.99 | $6.99 | one-time |
| $10.99 | $10.99 | one-time |
| $11.99 | $11.99 | one-time |
| $12.99 | $12.99 | one-time |
| $15.99 | $15.99 | one-time |
| $19.99 | $19.99 | one-time |
| $21.99 | $21.99 | one-time |
| $25.99 | $25.99 | one-time |
| $39.99 | $39.99 | one-time |
| $44.99 | $44.99 | one-time |
| $79.99 | $79.99 | one-time |
| $99.99 | $99.99 | one-time |


## Frequently asked questions

### Is Book.io free?

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

### Is Reader by Sol free?

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

### Which has better reviews, Book.io or Reader by Sol?

Book.io is rated higher. Book.io averages 4.8 out of 5 from 57 ratings, while Reader by Sol averages 4.1 from 13 ratings.

### Do Book.io or Reader by Sol have ads?

Neither Book.io nor Reader by Sol shows ads.

### Which is updated more often, Book.io or Reader by Sol?

Book.io ships an update every 2 months, and Reader by Sol fortnightly. Most recently, Book.io was updated on October 6, 2026 and Reader by Sol on September 23, 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.*