# Defend the Brain vs CodeAB

The clearest difference is monetization model: CodeAB at free against Defend the Brain's free with in-app purchases. Defend the Brain's advantage is iOS requirement (8.0 vs 17.6). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Defend the Brain sells 1 one-off in-app purchase and CodeAB sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Defend the Brain against 5.0 for CodeAB. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

Defend the Brain ships an update every 5 weeks, CodeAB every 6 weeks. The most recent releases landed on October 8, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Defend the Brain | CodeAB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/defend-the-brain-right-left-brain-test/id1240222889/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/codeab-logic-number-puzzle/id1616021619/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 6 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 57 MB | 3 MB |
| Requires iOS | **8.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Pixel Bistro](https://appshunter.io/developer/976506039) | [EssentialCapture Inc](https://appshunter.io/developer/1558967478) |

## What reviewers say

### Defend the Brain

[App page](https://appshunter.io/ios/app/defend-the-brain-right-left-brain-test/id1240222889)

Test your brain's speed and dominance between the left and right hemispheres. Compete globally in a game of split-second reactions. See if you can keep up with historical geniuses.

**Highlights:** Brain speed test, Left vs. Right brain dominance, Global leaderboards, Split-second reaction challenges, Compete with friends

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### CodeAB

[App page](https://appshunter.io/ios/app/codeab-logic-number-puzzle/id1616021619)

Test your logic and deduction skills in this addictive number puzzle game. Figure out the secret 4-digit code using hints after each guess. It's a fresh take on a classic puzzle, perfect for quick brain training.

**Highlights:** Deduction and logic gameplay, Secret 4-digit code challenge, Clues after every guess, No leading zeros or repeating digits, Quick brain training rounds, Classic Bulls & Cows style

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CodeAB | $2.99 | one-time |


## Frequently asked questions

### Is Defend the Brain free?

Defend the Brain is free to download, with in-app purchases available.

### Is CodeAB free?

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

### Which has better reviews, Defend the Brain or CodeAB?

Defend the Brain and CodeAB are both rated 5.0 out of 5 on the App Store, from 2 and 3 ratings respectively.

### Do Defend the Brain or CodeAB have ads?

Neither Defend the Brain nor CodeAB shows ads.

### Which is updated more often, Defend the Brain or CodeAB?

Defend the Brain ships an update every 5 weeks, and CodeAB every 6 weeks. Most recently, Defend the Brain was updated on October 8, 2026 and CodeAB on October 21, 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.*