# 零鴨蛋 vs 99乘法大挑戰：九九乘法練習

The clearest difference is in-app purchases: 零鴨蛋 at none against 99乘法大挑戰：九九乘法練習's 1. 零鴨蛋 also leads on iOS requirement (15.5 vs 17.0). 99乘法大挑戰：九九乘法練習's advantage is update cadence (weekly vs fortnightly). On price, 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. 零鴨蛋 asks for nothing beyond the download.

零鴨蛋 ships an update fortnightly, 99乘法大挑戰：九九乘法練習 weekly. The most recent releases landed on October 14, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 零鴨蛋 | 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 | Fortnightly | **Weekly** |
| Size | 191 MB | 118 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [wei ming chen](https://appshunter.io/developer/568881778) | [HSIHSUN HO](https://appshunter.io/developer/6774536504) |

## What reviewers say

### 零鴨蛋

[App page](https://appshunter.io/ios/app/id6763559099)

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

**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 零鴨蛋 free?

零鴨蛋 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 零鴨蛋 or 99乘法大挑戰：九九乘法練習 have ads?

Neither 零鴨蛋 nor 99乘法大挑戰：九九乘法練習 shows ads.

### Which is updated more often, 零鴨蛋 or 99乘法大挑戰：九九乘法練習?

零鴨蛋 ships an update fortnightly, and 99乘法大挑戰：九九乘法練習 weekly. Most recently, 零鴨蛋 was updated on October 14, 2026 and 99乘法大挑戰：九九乘法練習 on October 24, 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.*