# Book.io vs Regal Vault

The clearest difference is ads: Book.io at none against Regal Vault's shown. Regal Vault's advantage is update cadence (every 6 days vs every 2 months). On price, in-app purchases, device support 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.

Book.io ships an update every 2 months, Regal Vault every 6 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Book.io | Regal Vault |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (58 ratings)](https://appshunter.io/ios/app/bookio/id1661003233/reviews)** | — |
| Number of ratings | **58** | — |
| Positive reviews | 96.7% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 31 MB | 8 MB |
| Requires iOS | 16.0 | 16 |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [Book.io, Inc](https://appshunter.io/developer/1661003235) | [Moin Macarthur](https://appshunter.io/developer/6789523888) |

## 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


### Regal Vault

[App page](https://appshunter.io/ios/app/regal-vault/id6800025586)

**In-app purchases:** none


## Frequently asked questions

### Is Book.io free?

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

### Is Regal Vault free?

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

### Do Book.io or Regal Vault have ads?

Regal Vault shows ads; Book.io does not.

### Which is updated more often, Book.io or Regal Vault?

Book.io ships an update every 2 months, and Regal Vault every 6 days. Most recently, Book.io was updated on October 24, 2026 and Regal Vault on October 24, 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.*