# Brain Collector vs Kakuso Challenge

The clearest difference is update cadence: Brain Collector at monthly against Kakuso Challenge's every 6 months. Kakuso Challenge's advantage is device support and iOS requirement (13.1 vs 15.0). On price and in-app purchases there is nothing between them.

Both are free to download. Brain Collector sells 1 one-off in-app purchase and Kakuso Challenge sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Brain Collector ships an update monthly, Kakuso Challenge every 6 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Brain Collector | Kakuso Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | — | Yes |
| Update frequency | **Monthly** | Every 6 months |
| Monetization | Free | — |
| Size | 120 MB | 17 MB |
| Requires iOS | 15.0 | **13.1** |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Leonardo Carlos Comotti Kasperavicius](https://appshunter.io/developer/1888935035) | [Alven Kam](https://appshunter.io/developer/1227687322) |

## What reviewers say

### Brain Collector

[App page](https://appshunter.io/ios/app/brain-collector/id477255818)

Guide a doctor through a laboratory overrun by zombies to recover a spilled brain collection. Navigate 100 unique puzzle levels, avoiding enemies and reaching the exit portal.

**Highlights:** 100 challenging puzzle levels, 5 unique worlds, Collect all brains, Avoid zombies, Reach the exit portal, Retro pixel art style

**In-app purchases (1)**

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


### Kakuso Challenge

[App page](https://appshunter.io/ios/app/kakuso-challenge/id1485845940)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kakuso Challenge 20 Hints | $0.99 | one-time |
| Kakuso Challenge 50 Hints | $1.99 | one-time |
| Kakuso Challenge 100 Hints | $2.99 | one-time |


## Frequently asked questions

### Is Brain Collector free?

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

### Is Kakuso Challenge free?

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

### Which is updated more often, Brain Collector or Kakuso Challenge?

Brain Collector ships an update monthly, and Kakuso Challenge every 6 months. Most recently, Brain Collector was updated on November 1, 2026 and Kakuso Challenge on November 3, 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.*