# 楊煜文教機構 vs 99乘法大挑戰：九九乘法練習

The clearest difference is in-app purchases: 楊煜文教機構 at none against 99乘法大挑戰：九九乘法練習's 1. 楊煜文教機構 also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 99乘法大挑戰：九九乘法練習 sells 1 one-off in-app purchase. 楊煜文教機構 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | 楊煜文教機構 | 99乘法大挑戰：九九乘法練習 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Size | 87 MB | 118 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Chi Hsien Lai](https://appshunter.io/developer/1039759515) | [HSIHSUN HO](https://appshunter.io/developer/6774536504) |

## What reviewers say

### 楊煜文教機構

[App page](https://appshunter.io/ios/app/id6755587085)

**Features:** macOS Compatibility

**In-app purchases:** none


### 99乘法大挑戰：九九乘法練習

[App page](https://appshunter.io/ios/app/99/id6804374876)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 完整乘法學習・一次買斷 | $4.99 | one-time |


## Frequently asked questions

### Is 楊煜文教機構 free?

楊煜文教機構 is free to download, with no in-app purchases.

### Is 99乘法大挑戰：九九乘法練習 free?

99乘法大挑戰：九九乘法練習 is free to download, with in-app purchases available.

### Do 楊煜文教機構 or 99乘法大挑戰：九九乘法練習 have ads?

Neither 楊煜文教機構 nor 99乘法大挑戰：九九乘法練習 shows ads.

### Which is updated more often, 楊煜文教機構 or 99乘法大挑戰：九九乘法練習?

楊煜文教機構 ships an update weekly, and 99乘法大挑戰：九九乘法練習 weekly. Most recently, 楊煜文教機構 was updated on October 28, 2026 and 99乘法大挑戰：九九乘法練習 on October 29, 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.*