# IQ Test vs Siren's Spellbook

The clearest difference is ads: Siren's Spellbook at none against IQ Test's shown. Siren's Spellbook also leads on update cadence (every 2 weeks vs every 2 months). IQ Test's advantage is iOS requirement (13.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. IQ Test sells 3 one-off in-app purchases and Siren's Spellbook sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

IQ Test ships an update every 2 months, Siren's Spellbook every 2 weeks. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | IQ Test | Siren's Spellbook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (2.9K ratings)](https://appshunter.io/ios/app/iq-test-brain-cognitive-games/id511881037/reviews)** | — |
| Number of ratings | **2.9K** | — |
| Positive reviews | 63.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 83 MB | 26 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Games for Friends LLC](https://appshunter.io/developer/732493364) | [Jordan Collin](https://appshunter.io/developer/6778770884) |

## What reviewers say

### IQ Test

[App page](https://appshunter.io/ios/app/iq-test-brain-cognitive-games/id511881037)

Measure your intelligence quotient (IQ) with a professional, culture-free testing method. Discover your intellectual age, compare yourself to celebrities, and manage results for personal or professional use. Get detailed explanations and review errors to understand your cognitive abilities.

**Highlights:** Culture-free IQ testing method, Determine intellectual age, Compare IQ to celebrities, IQ score from 50 to 160, Test friends and family, Database of results, Review response errors

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy 10 testings | $0.99 | one-time |
| Buy 100 testings | $1.99 | one-time |
| Unlock unlimited mode | $2.99 | one-time |

**What reviewers like**

- 👍 Fun and challenging
- 🧠 Good brain exercise
- 🤔 Interesting patterns
- 💡 Creative problem-solving

**What reviewers complain about**

- ⏱️ 30-minute time limit should be adjustable
- 🧠 Tests only spatial and logical reasoning, not other aspects of intelligence
- 🤔 Unclear instructions on how to approach the questions
- 🤷‍♀️ Inconsistent or inaccurate IQ scores compared to other tests

**Reported bugs**

- Issues with entering date of birth and age
- Inability to access additional tests after purchase
- Confusing navigation and hidden costs

**Requested features**

- Offer more varied question types beyond just pattern recognition
- Provide explanations for correct answers
- Allow users to pause and resume the test
- Include sections to test different types of intelligence


### Siren's Spellbook

[App page](https://appshunter.io/ios/app/sirens-spellbook/id6778770762)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Siren’s Spellbook iPad Sheet Music | $14.99 | one-time |


## Frequently asked questions

### Is IQ Test free?

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

### Is Siren's Spellbook free?

Siren's Spellbook is free to download, with in-app purchases available.

### Do IQ Test or Siren's Spellbook have ads?

IQ Test shows ads; Siren's Spellbook does not.

### Which is updated more often, IQ Test or Siren's Spellbook?

IQ Test ships an update every 2 months, and Siren's Spellbook every 2 weeks. Most recently, IQ Test was updated on November 1, 2026 and Siren's Spellbook on November 5, 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.*