# BRAIN 99 vs 99鬼退治~99×99の問題に答えて鬼を倒そう

The clearest difference is update cadence: 99鬼退治~99×99の問題に答えて鬼を倒そう at daily against BRAIN 99's every 8 days. BRAIN 99's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 18.2). On price, ads and in-app purchases there is nothing between them.

Both are free to download. BRAIN 99 sells 12 one-off in-app purchases and 99鬼退治~99×99の問題に答えて鬼を倒そう sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

BRAIN 99 ships an update every 8 days, 99鬼退治~99×99の問題に答えて鬼を倒そう daily. The most recent releases landed on October 21, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | BRAIN 99 | 99鬼退治~99×99の問題に答えて鬼を倒そう |
| --- | --- | --- |
| 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 8 days | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 311 MB | 29 MB |
| Requires iOS | **12.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [XOGAMES Inc](https://appshunter.io/developer/1133102824) | [Yusaku Fujita](https://appshunter.io/developer/1506740830) |

## What reviewers say

### 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 |


### 99鬼退治~99×99の問題に答えて鬼を倒そう

[App page](https://appshunter.io/ios/app/999999/id6755892796)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムプラン　月額 | $2.99 | per month |
| プレミアムプラン 年額 | $24.99 | per year |
| リトライ機能 | $0.49 | one-time |


## Frequently asked questions

### Is BRAIN 99 free?

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

### Is 99鬼退治~99×99の問題に答えて鬼を倒そう free?

99鬼退治~99×99の問題に答えて鬼を倒そう is free to download, with in-app purchases available.

### Do BRAIN 99 or 99鬼退治~99×99の問題に答えて鬼を倒そう have ads?

Both BRAIN 99 and 99鬼退治~99×99の問題に答えて鬼を倒そう show ads.

### Which is updated more often, BRAIN 99 or 99鬼退治~99×99の問題に答えて鬼を倒そう?

BRAIN 99 ships an update every 8 days, and 99鬼退治~99×99の問題に答えて鬼を倒そう daily. Most recently, BRAIN 99 was updated on October 21, 2026 and 99鬼退治~99×99の問題に答えて鬼を倒そう on October 16, 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.*