# 太平小博士 vs 99乘法大挑戰：九九乘法練習

The clearest difference is in-app purchases: 太平小博士 at none against 99乘法大挑戰：九九乘法練習's 1. 太平小博士 also leads on iOS requirement (15.0 vs 17.0). 99乘法大挑戰：九九乘法練習's advantage is update cadence (weekly vs every 23 months) and device support. On price 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. 太平小博士 asks for nothing beyond the download.

太平小博士 ships an update every 23 months, 99乘法大挑戰：九九乘法練習 weekly. The most recent releases landed on October 9, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | 太平小博士 | 99乘法大挑戰：九九乘法練習 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 23 months | **Weekly** |
| Size | 86 MB | 118 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | — | **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

### 太平小博士

[App page](https://appshunter.io/ios/app/id6503692292)

**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 太平小博士 free?

太平小博士 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.

### Which is updated more often, 太平小博士 or 99乘法大挑戰：九九乘法練習?

太平小博士 ships an update every 23 months, and 99乘法大挑戰：九九乘法練習 weekly. Most recently, 太平小博士 was updated on October 9, 2026 and 99乘法大挑戰：九九乘法練習 on October 14, 2026.

---

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