# 次元钥匙 vs BrainJD

The clearest difference is update cadence: BrainJD at every 3 days against 次元钥匙's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 次元钥匙 sells 6 one-off in-app purchases and BrainJD sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

次元钥匙 ships an update every 2 months, BrainJD every 3 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | 次元钥匙 | BrainJD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6752248106/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Size | 124 MB | 109 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Henan Junfa Advertising Co., Ltd.](https://appshunter.io/developer/1819883711) | [非格式(杭州)智能科技有限公司](https://appshunter.io/developer/1875879049) |

## What reviewers say

### 次元钥匙

[App page](https://appshunter.io/ios/app/id6752248106)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 60 | $0.99 | one-time |
| 80 x 石头礼包 | $0.99 | one-time |
| 600 x 石头礼包 | $2.99 | one-time |
| 300 x 石头礼包 | $3.99 | one-time |
| 980 x 石头礼包 | $6.99 | one-time |
| 1980 x 石头礼包 | $14.99 | one-time |


### BrainJD

[App page](https://appshunter.io/ios/app/brainjd/id6758941457)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 瓦片充值 | $0.99 | one-time |
| 创建复刻音色卡 | $2.99 | one-time |
| 瓦片充值 | $3.99 | one-time |
| 季度会员 | $6.99 | one-time |
| 瓦片充值 | $9.99 | one-time |
| 购买自定义娃音 | $12.99 | one-time |
| 瓦片充值 | $19.99 | one-time |
| 年度会员 | $24.99 | one-time |
| 瓦片充值 | $49.99 | one-time |
| 瓦片充值 | $99.99 | one-time |


## Frequently asked questions

### Is 次元钥匙 free?

次元钥匙 is free to download, with in-app purchases available.

### Is BrainJD free?

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

### Do 次元钥匙 or BrainJD have ads?

Neither 次元钥匙 nor BrainJD shows ads.

### Which is updated more often, 次元钥匙 or BrainJD?

次元钥匙 ships an update every 2 months, and BrainJD every 3 days. Most recently, 次元钥匙 was updated on November 5, 2026 and BrainJD on November 5, 2026.

---

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