# Lumi Math Planet vs 99乘法大挑戰：九九乘法練習

The clearest difference is update cadence: Lumi Math Planet at every 3 days against 99乘法大挑戰：九九乘法練習's weekly. Lumi Math Planet also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Lumi Math Planet sells 1 one-off in-app purchase and 99乘法大挑戰：九九乘法練習 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Lumi Math Planet ships an update every 3 days, 99乘法大挑戰：九九乘法練習 weekly. Both last shipped on October 14, 2026.

## The numbers

| Metric | Lumi Math Planet | 99乘法大挑戰：九九乘法練習 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Weekly |
| Size | 56 MB | 118 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Guan Feng Lai](https://appshunter.io/developer/1136144960) | [HSIHSUN HO](https://appshunter.io/developer/6774536504) |

## What reviewers say

### Lumi Math Planet

[App page](https://appshunter.io/ios/app/lumi-math-planet-explorer/id6778269699)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock the Full Galaxy | $4.99 | one-time |


### 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 Lumi Math Planet free?

Lumi Math Planet is free to download, with in-app purchases available.

### 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 Lumi Math Planet or 99乘法大挑戰：九九乘法練習 have ads?

Neither Lumi Math Planet nor 99乘法大挑戰：九九乘法練習 shows ads.

### Which is updated more often, Lumi Math Planet or 99乘法大挑戰：九九乘法練習?

Lumi Math Planet ships an update every 3 days, and 99乘法大挑戰：九九乘法練習 weekly. Most recently, Lumi Math Planet was updated on October 14, 2026 and 99乘法大挑戰：九九乘法練習 on October 14, 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.*