# Cognitive Challenge vs Inkstroop

The clearest difference is update cadence: Inkstroop at every 3 days against Cognitive Challenge's every 2 months. Cognitive Challenge's advantage is iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Cognitive Challenge ships an update every 2 months, Inkstroop every 3 days. The most recent releases landed on September 14, 2026 and August 15, 2026 respectively.

## The numbers

| Metric | Cognitive Challenge | Inkstroop |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cognitive-challenge/id6764170208/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Ad-supported | — |
| Size | 40 MB | 5 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Boolean Bros LLC](https://appshunter.io/developer/1890936797) | [BIN WANG](https://appshunter.io/developer/1881032464) |

## What reviewers say

### Cognitive Challenge

[App page](https://appshunter.io/ios/app/cognitive-challenge/id6764170208)

This fast-paced game challenges your focus, reaction speed, and cognitive flexibility. Compete against your own scores and track your improvement with each session. It's designed to help you sharpen your mind through engaging gameplay.

**Highlights:** Focus testing, Reaction speed challenges, Cognitive flexibility exercises, Self-competition, Performance improvement tracking

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

**In-app purchases:** none


### Inkstroop

[App page](https://appshunter.io/ios/app/inkstroop/id6771827113)

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

**In-app purchases:** none


## Frequently asked questions

### Is Cognitive Challenge free?

Cognitive Challenge is free to download, with no in-app purchases.

### Is Inkstroop free?

Inkstroop is free to download, with no in-app purchases.

### Do Cognitive Challenge or Inkstroop have ads?

Both Cognitive Challenge and Inkstroop show ads.

### Which is updated more often, Cognitive Challenge or Inkstroop?

Cognitive Challenge ships an update every 2 months, and Inkstroop every 3 days. Most recently, Cognitive Challenge was updated on September 14, 2026 and Inkstroop on August 15, 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.*