# Book vs Coil Reader

The clearest difference is ads: Coil Reader at none against Book's shown. Coil Reader also leads on update cadence (every 11 days vs every 6 months). Book's advantage is iOS requirement (15.1 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Book sells 1 one-off in-app purchase and Coil Reader sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Book ships an update every 6 months, Coil Reader every 11 days. The most recent releases landed on September 8, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Book | Coil Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 11 days** |
| Size | 60 MB | 39 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TATSUO NAKANO](https://appshunter.io/developer/1846200191) | [Infinite Epiphany Inc.](https://appshunter.io/developer/6792904417) |

## What reviewers say

### Book

[App page](https://appshunter.io/ios/app/book-lifecycle-manager/id6757215528)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $5.99 | one-time |


### Coil Reader

[App page](https://appshunter.io/ios/app/coil-reader/id6796910059)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coil Premium | $2.99 | one-time |


## Frequently asked questions

### Is Book free?

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

### Is Coil Reader free?

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

### Do Book or Coil Reader have ads?

Book shows ads; Coil Reader does not.

### Which is updated more often, Book or Coil Reader?

Book ships an update every 6 months, and Coil Reader every 11 days. Most recently, Book was updated on September 8, 2026 and Coil Reader on September 17, 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.*