# 恒久牙医助手 vs 友开发

The clearest difference is update cadence: 恒久牙医助手 at monthly against 友开发's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

恒久牙医助手 ships an update monthly, 友开发 every 2 months. The most recent releases landed on September 22, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | 恒久牙医助手 | 友开发 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Size | 31 MB | 88 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [衡 张](https://appshunter.io/developer/1076236115) | [Yonyou Network Technology Co., Ltd](https://appshunter.io/developer/446060994) |

## What reviewers say

### 恒久牙医助手

[App page](https://appshunter.io/ios/app/id1175692080)

**Features:** macOS Compatibility

**In-app purchases:** none


### 友开发

[App page](https://appshunter.io/ios/app/id6445975079)

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

**In-app purchases:** none


## Frequently asked questions

### Is 恒久牙医助手 free?

恒久牙医助手 is free to download, with no in-app purchases.

### Is 友开发 free?

友开发 is free to download, with no in-app purchases.

### Do 恒久牙医助手 or 友开发 have ads?

Neither 恒久牙医助手 nor 友开发 shows ads.

### Which is updated more often, 恒久牙医助手 or 友开发?

恒久牙医助手 ships an update monthly, and 友开发 every 2 months. Most recently, 恒久牙医助手 was updated on September 22, 2026 and 友开发 on September 10, 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.*