# BlueChess vs IQ Challenge Book

The clearest difference is update cadence: BlueChess at every 4 months against IQ Challenge Book's every 76 months. On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for BlueChess against 5.0 for IQ Challenge Book. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

BlueChess ships an update every 4 months, IQ Challenge Book every 76 months. The most recent releases landed on September 19, 2026 and August 31, 2026 respectively.

## The numbers

| Metric | BlueChess | IQ Challenge Book |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/bluechess/id620176785/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/iq-challenge-book/id1320107027/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 76 months |
| Monetization | Free | Free |
| Size | 55 MB | 1 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [GreenChess.com](https://appshunter.io/developer/532381678) | [Adrian Minca](https://appshunter.io/developer/1224651577) |

## What reviewers say

### BlueChess

[App page](https://appshunter.io/ios/app/bluechess/id620176785)

Engage in strategic gameplay with powerful chess engines. Choose between the BlueChess engine or the highly-rated Stockfish engine for your matches.

**Highlights:** Play against BlueChess engine, Play against Stockfish engine, Strategic gameplay, Free to play

**In-app purchases:** none


### IQ Challenge Book

[App page](https://appshunter.io/ios/app/iq-challenge-book/id1320107027)

Assess your intelligence level with this application that provides an IQ score based on your answers to a series of questions. It categorizes your score according to a standard IQ scale, ranging from genius to feeble-mindedness. Test your limits and discover your intelligence quotient.

**Highlights:** IQ score determination, Intelligence level assessment, IQ score categorization, Test your limits, User-friendly interface

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

**In-app purchases:** none


## Frequently asked questions

### Is BlueChess free?

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

### Is IQ Challenge Book free?

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

### Which has better reviews, BlueChess or IQ Challenge Book?

BlueChess and IQ Challenge Book are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do BlueChess or IQ Challenge Book have ads?

Neither BlueChess nor IQ Challenge Book shows ads.

### Which is updated more often, BlueChess or IQ Challenge Book?

BlueChess ships an update every 4 months, and IQ Challenge Book every 76 months. Most recently, BlueChess was updated on September 19, 2026 and IQ Challenge Book on August 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.*