# 九九を覚えてモンスター図鑑あつめ！ 「九九のトライ」 vs Knowtopia

The clearest difference is in-app purchases: 九九を覚えてモンスター図鑑あつめ！ 「九九のトライ」 at none against Knowtopia's 1. Knowtopia's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Knowtopia sells 1 one-off in-app purchase. 九九を覚えてモンスター図鑑あつめ！ 「九九のトライ」 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 26, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | 九九を覚えてモンスター図鑑あつめ！ 「九九のトライ」 | Knowtopia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id894395724/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 38.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Ad-supported | — |
| Size | 286 MB | 59 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pixel Co., Ltd.](https://appshunter.io/developer/1743924614) | [Chad Alexander Knowlton](https://appshunter.io/developer/1845256027) |

## What reviewers say

### 九九を覚えてモンスター図鑑あつめ！ 「九九のトライ」

[App page](https://appshunter.io/ios/app/id894395724)

This app makes learning multiplication tables fun for children. Solve problems to collect and evolve monsters, filling a monster encyclopedia. Features multiple learning modes and challenges to build math skills.

**Highlights:** Learn multiplication tables (1-9), Collect and evolve 40 unique monsters, Three learning modes: sequential, reverse, random, Daily challenge with word problems, Monster encyclopedia completion, Game-like learning for engagement

**Features:** Vision Pro support

**In-app purchases:** none


### Knowtopia

[App page](https://appshunter.io/ios/app/knowtopia/id6753843222)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Knowtopia Full-Access | $0.49 | one-time |


## Frequently asked questions

### Is 九九を覚えてモンスター図鑑あつめ！ 「九九のトライ」 free?

九九を覚えてモンスター図鑑あつめ！ 「九九のトライ」 is free to download, with no in-app purchases.

### Is Knowtopia free?

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

### Do 九九を覚えてモンスター図鑑あつめ！ 「九九のトライ」 or Knowtopia have ads?

九九を覚えてモンスター図鑑あつめ！ 「九九のトライ」 shows ads; Knowtopia does not.

### Which is updated more often, 九九を覚えてモンスター図鑑あつめ！ 「九九のトライ」 or Knowtopia?

九九を覚えてモンスター図鑑あつめ！ 「九九のトライ」 ships an update every 3 months, and Knowtopia every 3 months. Most recently, 九九を覚えてモンスター図鑑あつめ！ 「九九のトライ」 was updated on October 26, 2026 and Knowtopia on September 20, 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.*