# Adopt a Book vs StoryGraph

The clearest difference is in-app purchases: Adopt a Book at none against StoryGraph's 2. Adopt a Book also leads on iOS requirement (15.5 vs 17.6). StoryGraph's advantage is ads (none vs shown) and update cadence (every 2 days vs every 2 weeks). On price and device support there is nothing between them.

Both are free to download. StoryGraph sells 2 in-app purchases, starting at $4.99 per month. Adopt a Book asks for nothing beyond the download.

Adopt a Book ships an update every 2 weeks, StoryGraph every 2 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | Adopt a Book | StoryGraph |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Size | 101 MB | 2 MB |
| Requires iOS | **15.5** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Praneeth Peiris](https://appshunter.io/developer/1638142024) | [Igor Stojanovic](https://appshunter.io/developer/1823750175) |

## What reviewers say

### Adopt a Book

[App page](https://appshunter.io/ios/app/adopt-a-book/id1638142022)

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

**In-app purchases:** none


### StoryGraph

[App page](https://appshunter.io/ios/app/storygraph-quick-book-summary/id6786723261)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Month Subscription | $4.99 | per month |
| Year Subscription | $24.99 | per year |


## Frequently asked questions

### Is Adopt a Book free?

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

### Is StoryGraph free?

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

### Do Adopt a Book or StoryGraph have ads?

Adopt a Book shows ads; StoryGraph does not.

### Which is updated more often, Adopt a Book or StoryGraph?

Adopt a Book ships an update every 2 weeks, and StoryGraph every 2 days. Most recently, Adopt a Book was updated on October 25, 2026 and StoryGraph 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.*