# 中齿云教育 vs 七颗牙学堂HD

The clearest difference is update cadence: 中齿云教育 at every 3 weeks against 七颗牙学堂HD's every 6 months. 中齿云教育 also leads on device support (3 vs 1) and iOS requirement (9.0 vs 12.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. 中齿云教育 sells 10 one-off in-app purchases and 七颗牙学堂HD sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

中齿云教育 ships an update every 3 weeks, 七颗牙学堂HD every 6 months. The most recent releases landed on November 2, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 中齿云教育 | 七颗牙学堂HD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 months |
| Size | 188 MB | 54 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 17+ | 17+ |
| Developer | [Zhengzhou Zhongchi Enterprise Management Consulting Co., Ltd.](https://appshunter.io/developer/1118813829) | [春辉 刘](https://appshunter.io/developer/1459975616) |

## What reviewers say

### 中齿云教育

[App page](https://appshunter.io/ios/app/id1118813830)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 中齿账户充值198齿币 | $29.99 | one-time |
| 普通会员1个月 | $29.99 | one-time |
| 中齿账户充值798齿币 | $119.99 | one-time |
| 普通会员1年(798元) | $119.99 | one-time |
| 开通赢在接诊 | $119.99 | one-time |
| 开通开业牙医 | $119.99 | one-time |
| 直播专栏 | $119.99 | one-time |
| 年会员续费 | $149.99 | one-time |
| 中齿账户充值1298齿币 | $199.99 | one-time |
| 高级会员1年(3998元) | $599.99 | one-time |


### 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 |


## Frequently asked questions

### Is 中齿云教育 free?

中齿云教育 is free to download, with in-app purchases available.

### Is 七颗牙学堂HD free?

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

### Do 中齿云教育 or 七颗牙学堂HD have ads?

Neither 中齿云教育 nor 七颗牙学堂HD shows ads.

### Which is updated more often, 中齿云教育 or 七颗牙学堂HD?

中齿云教育 ships an update every 3 weeks, and 七颗牙学堂HD every 6 months. Most recently, 中齿云教育 was updated on November 2, 2026 and 七颗牙学堂HD on October 27, 2026.

---

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