# 七颗牙学堂HD vs 医启星

The clearest difference is update cadence: 医启星 at weekly against 七颗牙学堂HD's every 6 months. 医启星 also leads on device support (3 vs 1). 七颗牙学堂HD's advantage is iOS requirement (12.0 vs 14). On price, ads and in-app purchases there is nothing between them.

Both are free to download. 七颗牙学堂HD sells 8 one-off in-app purchases and 医启星 sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

七颗牙学堂HD ships an update every 6 months, 医启星 weekly. The most recent releases landed on September 11, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | 七颗牙学堂HD | 医启星 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 95.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Size | 54 MB | 238 MB |
| Requires iOS | **12.0** | 14 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [春辉 刘](https://appshunter.io/developer/1459975616) | [Chongqing Yiqixing Cultural Technology Co., Ltd](https://appshunter.io/developer/1823946593) |

## What reviewers say

### 七颗牙学堂HD

[App page](https://appshunter.io/ios/app/hd/id6443649334)

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 小七币 | $0.99 | one-time |
| 小七币 | $4.99 | one-time |
| 小七币 | $7.99 | one-time |
| 小七币 | $15.99 | one-time |
| 小七币 | $17.99 | one-time |
| 小七币 | $74.99 | one-time |
| 小七币 | $149.99 | one-time |
| 小七币 | $449.99 | one-time |


### 医启星

[App page](https://appshunter.io/ios/app/id6748436050)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 考前预测三套卷(一) | $14.99 | one-time |
| 考前冲刺精英课 | $149.99 | one-time |
| 考前冲刺王者课 | $299.99 | one-time |


## Frequently asked questions

### Is 七颗牙学堂HD free?

七颗牙学堂HD is free to download, with in-app purchases available.

### Is 医启星 free?

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

### Do 七颗牙学堂HD or 医启星 have ads?

Neither 七颗牙学堂HD nor 医启星 shows ads.

### Which is updated more often, 七颗牙学堂HD or 医启星?

七颗牙学堂HD ships an update every 6 months, and 医启星 weekly. Most recently, 七颗牙学堂HD was updated on September 11, 2026 and 医启星 on September 22, 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.*