# FinnBook eBook reader vs Duo Reader

The clearest difference is in-app purchases: Duo Reader at none against FinnBook eBook reader's 2. Duo Reader also leads on iOS requirement (17.6 vs 26.0). FinnBook eBook reader's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. FinnBook eBook reader sells 2 in-app purchases, starting at $1.99 per month. Duo Reader asks for nothing beyond the download.

FinnBook eBook reader ships an update every 3 days, Duo Reader every 6 days. The most recent releases landed on October 14, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | FinnBook eBook reader | Duo Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 6 days |
| Size | 21 MB | 95 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Maziar Rezvani](https://appshunter.io/developer/937664407) | [LeoStudio Global](https://appshunter.io/developer/1700204948) |

## What reviewers say

### FinnBook eBook reader

[App page](https://appshunter.io/ios/app/finnbook-ebook-reader/id6770285856)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FinnBook Pro | $1.99 | per month |
| FinnBook Pro | $19.99 | per year |


### Duo Reader

[App page](https://appshunter.io/ios/app/duo-reader/id6815597778)

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

**In-app purchases:** none


## Frequently asked questions

### Is FinnBook eBook reader free?

FinnBook eBook reader is free to download, with in-app purchases available.

### Is Duo Reader free?

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

### Do FinnBook eBook reader or Duo Reader have ads?

Duo Reader shows ads; FinnBook eBook reader does not.

### Which is updated more often, FinnBook eBook reader or Duo Reader?

FinnBook eBook reader ships an update every 3 days, and Duo Reader every 6 days. Most recently, FinnBook eBook reader was updated on October 14, 2026 and Duo Reader on October 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.*