# KG vs Math Duel

The clearest difference is in-app purchases: KG at none against Math Duel's 1. KG also leads on device support (3 vs 1) and iOS requirement (8.0 vs 26.0). On price and ads there is nothing between them.

Both are free to download. Math Duel sells 1 one-off in-app purchase. KG asks for nothing beyond the download.

## The numbers

| Metric | KG | Math Duel |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 8.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Monetization | Free | — |
| Size | 44 MB | 16 MB |
| Requires iOS | **8.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Lines Co.,Ltd.](https://appshunter.io/developer/726910209) | [Rufat Babayev](https://appshunter.io/developer/1388465272) |

## What reviewers say

### KG

[App page](https://appshunter.io/ios/app/kg-viewer/id1352250519)

This app is exclusively for students attending Keiyo Gakuin. It allows users to review lesson content and assignments from home if they miss or are late for a class. Access requires a valid ID and password.

**Highlights:** Review missed or late lessons, Access assignments, Home-based learning, Requires student ID and password

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

**In-app purchases:** none


### Math Duel

[App page](https://appshunter.io/ios/app/math-duel-2-player-games/id6784735255)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $9.99 | one-time |


## Frequently asked questions

### Is KG free?

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

### Is Math Duel free?

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

### Do KG or Math Duel have ads?

Neither KG nor Math Duel shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*