# Neg Multiply vs Koreez

The clearest difference is in-app purchases: Neg Multiply at none against Koreez's 13. Koreez's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 5 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Koreez sells 13 in-app purchases, starting at $1.90 per 7 days. Neg Multiply asks for nothing beyond the download.

Neg Multiply ships an update every 5 weeks, Koreez every 2 weeks. The most recent releases landed on September 23, 2026 and September 4, 2026 respectively.

## The numbers

| Metric | Neg Multiply | Koreez |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (39 ratings)](https://appshunter.io/ios/app/koreez/id6465207992/reviews)** |
| Number of ratings | — | **39** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | — | Freemium |
| Size | 32 MB | 58 MB |
| Requires iOS | 16.6 | 16.6 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Katsuhiko Yao](https://appshunter.io/developer/1543188534) | [KoreezKoreez Educational Program CJS](https://appshunter.io/developer/1706487729) |

## What reviewers say

### Neg Multiply

[App page](https://appshunter.io/ios/app/neg-multiply-brain-training/id6450744705)

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

**In-app purchases:** none


### Koreez

[App page](https://appshunter.io/ios/app/koreez/id6465207992)

Engage in a competitive quiz game that blends school curriculum with general knowledge. Challenge friends, earn points, and climb leaderboards to become a quiz champion. Suitable for students and knowledge seekers of all ages.

**Highlights:** Curriculum-based quizzes, General knowledge questions, Competitive gameplay, Leaderboard rankings, Friend challenges, Brainpower boosting

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

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $1.90 | per 7 days |
| Monthly Subscription | $3.99 | per month |
| Monthly Subscription | $4.95 | per month |
| Monthly Subscription | $5.99 | per month |
| Yearly Subscription | $19.99 | per year |
| Yearly Subscription | $37.49 | per year |
| Yearly Subscription | $40.90 | per year |
| 30 keys | $0.49 | one-time |
| 70 keys | $0.99 | one-time |
| 150 keys | $1.99 | one-time |
| 320 keys | $3.99 | one-time |
| Event Ticket | $5.99 | one-time |
| Combo | $6.99 | one-time |


## Frequently asked questions

### Is Neg Multiply free?

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

### Is Koreez free?

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

### Do Neg Multiply or Koreez have ads?

Neg Multiply shows ads; Koreez does not.

### Which is updated more often, Neg Multiply or Koreez?

Neg Multiply ships an update every 5 weeks, and Koreez every 2 weeks. Most recently, Neg Multiply was updated on September 23, 2026 and Koreez on September 4, 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.*