# 数独城 vs Brain Test ~Activate~

The clearest difference is in-app purchases: Brain Test ~Activate~ at none against 数独城's 5. Brain Test ~Activate~ also leads on iOS requirement (12.0 vs 15.0). 数独城's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. 数独城 sells 5 one-off in-app purchases. Brain Test ~Activate~ asks for nothing beyond the download.

数独城 ships an update every 9 days, Brain Test ~Activate~ every 2 weeks. The most recent releases landed on August 25, 2026 and August 24, 2026 respectively.

## The numbers

| Metric | 数独城 | Brain Test ~Activate~ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Size | 28 MB | 133 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [正旋 金](https://appshunter.io/developer/1452746772) | [chiyo toyoshima](https://appshunter.io/developer/1707114649) |

## What reviewers say

### 数独城

[App page](https://appshunter.io/ios/app/id1670078749)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 数独币100枚 | $0.99 | one-time |
| Unlock all levels | $0.99 | one-time |
| 解锁模式avatar | $0.99 | one-time |
| 解锁模式color | $0.99 | one-time |
| 100 correction opportunities | $1.99 | one-time |


### Brain Test ~Activate~

[App page](https://appshunter.io/ios/app/brain-test-activate/id6474924305)

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

**In-app purchases:** none


## Frequently asked questions

### Is 数独城 free?

数独城 is free to download, with in-app purchases available.

### Is Brain Test ~Activate~ free?

Brain Test ~Activate~ is free to download, with no in-app purchases.

### Do 数独城 or Brain Test ~Activate~ have ads?

Brain Test ~Activate~ shows ads; 数独城 does not.

### Which is updated more often, 数独城 or Brain Test ~Activate~?

数独城 ships an update every 9 days, and Brain Test ~Activate~ every 2 weeks. Most recently, 数独城 was updated on August 25, 2026 and Brain Test ~Activate~ on August 24, 2026.

---

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