IQ Challenge Book vs Dozen
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
IQ Challenge Book
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.
- IQ score determination
- Intelligence level assessment
- IQ score categorization
- Test your limits
- User-friendly interface
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Have you ever wondered how smart you are compared to the people in your life, or even compared to all people your age? You can get a good idea of your intelligence level by determining your IQ. An IQ, or intelligence quotient, is a score you receive on a test that assesses intelligence. The following scale resulted for classifying IQ scores: IQ Scale Over 140 - Genius or almost genius 120 - 140 - Very superior intelligence 110 - 119 - Superior intelligence 90 - 109 - Average or normal intelligence 80 - 89 - Dullness 70 - 79 - Borderline deficiency in intelligence Under 70 - Feeble-mindedness After you answer to all questions, just click on the Final Result button. This app will test your limits!Enjoy!
Dozen
A challenging memory card game where you compete against your iPhone to test and improve your memorization skills. Flip cards, match pairs, and score points before the device outmaneuvers you. Engage in fast-paced, addictive gameplay anytime, anywhere.
- Memory card game
- Compete against iPhone
- Memorize card locations
- Score pairing points
- Fast-paced gameplay
- Sharpen memory
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Dozen is a new kind of memory card game, one in which you play against the iPhone© to prove your memorizing abilities. Flip cards, memorize their locations, and score pairing points before the iPhone© beats you to it. Challenge your mind, sharpen your memory, and engage in fast-paced gameplay that is addictive, right from your pocket. Take Dozen with you wherever you go, pairing off cards as you race against your iPhone©. It’s a great way to travel, unwind after a long day, or simply take a break from the work or studying at hand.
Screenshots
Verdict
The clearest difference is update cadence: Dozen at every 5 months against IQ Challenge Book's every 76 months. Dozen also leads on ratings volume (21 vs 1). On price, rating, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 IQ Challenge Book against 4.9 for Dozen. That said, the two scores are not equally well evidenced: Dozen has 21 ratings behind it against 1, so its average is the more settled of the two.
IQ Challenge Book ships an update every 76 months, Dozen every 5 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | IQ Challenge Book | Dozen |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.9 (21 ratings) |
| Positive reviews | — | 96.6% of reviews |
| Number of ratings | 1 | 21 — better |
| Update frequency | Every 76 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 29 MB |
| Age rating | 4+ | 17+ |
| Developer | Adrian Minca | Igor Fedorov |
Customer experience
IQ Challenge Book
Dozen
In-app purchases
IQ Challenge Book
No in-app purchases
Dozen
No in-app purchases
