# ビノバ 国語 vs 素数チャレンジ！

The clearest difference is in-app purchases: ビノバ 国語 at none against 素数チャレンジ！'s 1. ビノバ 国語 also leads on iOS requirement (15.6 vs 26.2). 素数チャレンジ！'s advantage is update cadence (every 6 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. 素数チャレンジ！ sells 1 one-off in-app purchase. ビノバ 国語 asks for nothing beyond the download.

ビノバ 国語 ships an update every 2 months, 素数チャレンジ！ every 6 days. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | ビノバ 国語 | 素数チャレンジ！ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/id790263602/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 6 days** |
| Monetization | Ad-supported | — |
| Size | 150 MB | 6 MB |
| Requires iOS | **15.6** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [funspire, Inc.](https://appshunter.io/developer/928040148) | [Kenji Yanase](https://appshunter.io/developer/1865920313) |

## What reviewers say

### ビノバ 国語

[App page](https://appshunter.io/ios/app/id790263602)

This app helps elementary school second graders review Japanese language skills. It features a large number of multiple-choice questions categorized by textbook publisher and learning unit, making it a convenient alternative to traditional workbooks. Gamified elements like monster collection are included to boost motivation.

**Highlights:** Covers all 2nd-grade kanji, 550 practice questions, Selectable learning units, Monster collection for motivation, Supports iPad and iPhone

**In-app purchases:** none


### 素数チャレンジ！

[App page](https://appshunter.io/ios/app/id6767792008)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム機能 | $0.99 | one-time |


## Frequently asked questions

### Is ビノバ 国語 free?

ビノバ 国語 is free to download, with no in-app purchases.

### Is 素数チャレンジ！ free?

素数チャレンジ！ is free to download, with in-app purchases available.

### Do ビノバ 国語 or 素数チャレンジ！ have ads?

Both ビノバ 国語 and 素数チャレンジ！ show ads.

### Which is updated more often, ビノバ 国語 or 素数チャレンジ！?

ビノバ 国語 ships an update every 2 months, and 素数チャレンジ！ every 6 days. Most recently, ビノバ 国語 was updated on November 8, 2026 and 素数チャレンジ！ 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.*