# IQ Test vs CO2 World Info

The clearest difference is in-app purchases: CO2 World Info at none against IQ Test's 7. CO2 World Info also leads on ads (none vs shown). IQ Test's advantage is iOS requirement (12.0 vs 16.0). On price, update cadence and device support there is nothing between them.

Both are free to download. IQ Test sells 7 one-off in-app purchases. CO2 World Info asks for nothing beyond the download.

IQ Test ships an update every 5 weeks, CO2 World Info every 2 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | IQ Test | CO2 World Info |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (55 ratings)](https://appshunter.io/ios/app/iq-test-intelligence-and-logic/id1644378921/reviews)** | — |
| Number of ratings | **55** | — |
| Positive reviews | 90.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 140 MB | 41 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Cristina Munoz Castillo](https://appshunter.io/developer/1600497964) | [LineSpotting AB](https://appshunter.io/developer/1326519237) |

## What reviewers say

### IQ Test

[App page](https://appshunter.io/ios/app/iq-test-intelligence-and-logic/id1644378921)

Assess your intelligence with a full IQ test and engage in brain training exercises. Practice logic puzzles, memory challenges, and math problems to enhance cognitive skills. Offers timed and untimed modes for personalized mental workouts.

**Highlights:** Full-length IQ-style test, Short practice quizzes, Logic puzzles, Memory exercises, Math problems, Progress tracking, Daily challenges

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 Coins | $0.49 | one-time |
| 20 Coins | $0.99 | one-time |
| 50 Coins | $2.99 | one-time |
| No ads | $3.99 | one-time |
| 100 Coins | $3.99 | one-time |
| 250 Coins | $4.99 | one-time |
| FULL GAME | $5.99 | one-time |


### CO2 World Info

[App page](https://appshunter.io/ios/app/co2-world-info/id6475678206)

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

**In-app purchases:** none


## Frequently asked questions

### Is IQ Test free?

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

### Is CO2 World Info free?

CO2 World Info is free to download, with no in-app purchases.

### Do IQ Test or CO2 World Info have ads?

IQ Test shows ads; CO2 World Info does not.

### Which is updated more often, IQ Test or CO2 World Info?

IQ Test ships an update every 5 weeks, and CO2 World Info every 2 months. Most recently, IQ Test was updated on November 3, 2026 and CO2 World Info on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*