# Book2Board vs KarpaChess

The clearest difference is price: KarpaChess at Free against Book2Board's $1.99. KarpaChess also leads on update cadence (every 3 days vs every 3 months) and iOS requirement (15.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

KarpaChess is free to download; Book2Board costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Book2Board ships an update every 3 months, KarpaChess every 3 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Book2Board | KarpaChess |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 days** |
| Size | 89 MB | 171 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Rhinolabs Agency LLC](https://appshunter.io/developer/1860987245) | [Mourad GHAFIRI](https://appshunter.io/developer/1896774994) |

## What reviewers say

### Book2Board

[App page](https://appshunter.io/ios/app/book2board-chess-book-study/id6756503877)

**Features:** macOS Compatibility

**In-app purchases:** none


### KarpaChess

[App page](https://appshunter.io/ios/app/karpachess/id6808091046)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Book2Board free?

Book2Board costs $1.99, with no in-app purchases.

### Is KarpaChess free?

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

### Do Book2Board or KarpaChess have ads?

Neither Book2Board nor KarpaChess shows ads.

### Which is updated more often, Book2Board or KarpaChess?

Book2Board ships an update every 3 months, and KarpaChess every 3 days. Most recently, Book2Board was updated on November 5, 2026 and KarpaChess on October 31, 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.*