# 知識問答測驗 vs BRAIN 99

The clearest difference is update cadence: 知識問答測驗 at every 4 days against BRAIN 99's every 8 days. BRAIN 99's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 知識問答測驗 sells 1 one-off in-app purchase and BRAIN 99 sells 12 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

知識問答測驗 ships an update every 4 days, BRAIN 99 every 8 days. The most recent releases landed on October 27, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | 知識問答測驗 | BRAIN 99 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/brain-99-quick-brain-battle/id6456751981/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 4 days** | Every 8 days |
| Monetization | — | Free with in-app purchases |
| Size | 61 MB | 311 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kwok Chun Hin](https://appshunter.io/developer/446734044) | [XOGAMES Inc](https://appshunter.io/developer/1133102824) |

## What reviewers say

### 知識問答測驗

[App page](https://appshunter.io/ios/app/id6450145384)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP | $0.99 | one-time |


### BRAIN 99

[App page](https://appshunter.io/ios/app/brain-99-quick-brain-battle/id6456751981)

Engage in real-time brain battles with friends and family. This game offers over 20 challenges to activate different parts of your brain, improving memory, observation, and calculation skills. Compete for rewards and titles to boost your IQ.

**Highlights:** Real-time multiplayer brain battles, Over 20 brain-activating challenges, Improves memory, observation, analysis, focus, calculation, Competitive rankings and rewards, Intuitive gameplay for all ages, Unlock new challenges and titles

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coins x1100 | $1.99 | one-time |
| Starter Pack Lv.1 | $1.99 | one-time |
| Coins x2500 | $3.99 | one-time |
| Starter Pack Lv.2 | $3.99 | one-time |
| No Ads | $5.99 | one-time |
| Starter Pack Lv.3 | $5.99 | one-time |
| Starter Pack | $5.99 | one-time |
| Coins x7500 | $7.99 | one-time |
| Starter Pack All | $7.99 | one-time |
| Coins x14900 | $14.99 | one-time |
| Coins x27000 | $17.99 | one-time |
| Coins x50000 | $22.99 | one-time |


## Frequently asked questions

### Is 知識問答測驗 free?

知識問答測驗 is free to download, with in-app purchases available.

### Is BRAIN 99 free?

BRAIN 99 is free to download, with in-app purchases available.

### Do 知識問答測驗 or BRAIN 99 have ads?

Both 知識問答測驗 and BRAIN 99 show ads.

### Which is updated more often, 知識問答測驗 or BRAIN 99?

知識問答測驗 ships an update every 4 days, and BRAIN 99 every 8 days. Most recently, 知識問答測驗 was updated on October 27, 2026 and BRAIN 99 on October 21, 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.*