— Comparison
Core Brain vs Free Online IQ Tests
— Don't just read about it
Find out YOUR exact IQ
20-min calibrated test · real psychometrics
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Most "free IQ tests" online (free-iqtest.net, iq-test.net, etc.) are clickbait quizzes that hand out inflated scores to drive sharing. Here's the difference.
| FreeIQTest.com | Core Brain | |
|---|---|---|
| Format | Short quizzes (5-15 minutes), no published methodology, scores tend to be inflated by 15-30 points to encourage sharing | 20-minute calibrated test, IRT 3PL Bayesian scoring methodology disclosed, returns 95% confidence interval (real psychometric tests always include uncertainty) |
| Methodology | Undisclosed / proprietary | IRT 3PL Bayesian MAP |
| Confidence interval | No | Yes (95% CI) |
| Six-axis breakdown | No | Yes |
| Time | 15-30 min | 20 min |
| Cost | Free | $15 |
— Try one before you read on
If 5 cats catch 5 mice in 5 minutes, how long does it take 100 cats to catch 100 mice?
Each cat catches 1 mouse in 5 min. 100 cats catch 100 mice in 5 min.
That was 1 question. Take the full 20-min test →
Verdict
→Pause. Find out YOUR IQ before you keep reading.The free quiz tests are entertainment. They tell you what you want to hear. Core Brain returns a normed score with measurement uncertainty — sometimes higher than you expected, often lower.
Try Core Brain
20 minutes, six cognitive axes, full normed IQ with 95% confidence interval. $15 unlock or take a promo code if you have one.
Which should you take?
→Curious how YOU score? 20-min calibrated test.Take FreeIQTest.com if:
- You want a short entertainment-grade quiz
- You're not concerned with measurement accuracy
Take Core Brain if:
- You want a calibrated 20-minute test with real IRT scoring
- You want to see WHICH cognitive axis you're strongest in, not just a single number
- You want a 95% confidence interval on your score (the mark of a real psychometric test)
- You want a downloadable certificate