# Knowledge Arena vs Stack Rush

The clearest difference is in-app purchases: Stack Rush at none against Knowledge Arena's 1. Knowledge Arena's advantage is ads (none vs shown) and update cadence (every 3 days vs weekly). On price and device support there is nothing between them.

Both are free to download. Knowledge Arena sells 1 one-off in-app purchase. Stack Rush asks for nothing beyond the download.

Knowledge Arena ships an update every 3 days, Stack Rush weekly. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Knowledge Arena | Stack Rush |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/knowledge-arena/id1450066612/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Weekly |
| Monetization | Free with in-app purchases | — |
| Size | 61 MB | 72 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hoa Nguyen Quang](https://appshunter.io/developer/1434185665) | [URANI SOFTWARE SOLUTIONS COMPANY LIMITED](https://appshunter.io/developer/1698507389) |

## What reviewers say

### Knowledge Arena

[App page](https://appshunter.io/ios/app/knowledge-arena/id1450066612)

This game challenges your knowledge across multiple languages with various difficulty levels and modes. Utilize helpful supports to overcome tough questions and compete on global leaderboards. Train your brain with tens of thousands of questions covering diverse topics.

**Highlights:** Multiple difficulty levels (Easy, Medium, Hard, Synthetic), Practice and test modes, Four types of user supports (Change Questions, Audience, Call, 50/50), 10 question packages in various languages, Online ranking and leaderboard, Sound effects

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


### Stack Rush

[App page](https://appshunter.io/ios/app/stack-rush-merge-number-games/id6761812896)

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

**In-app purchases:** none


## Frequently asked questions

### Is Knowledge Arena free?

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

### Is Stack Rush free?

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

### Do Knowledge Arena or Stack Rush have ads?

Stack Rush shows ads; Knowledge Arena does not.

### Which is updated more often, Knowledge Arena or Stack Rush?

Knowledge Arena ships an update every 3 days, and Stack Rush weekly. Most recently, Knowledge Arena was updated on November 2, 2026 and Stack Rush on November 5, 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.*