# 金不换OA管理系统 vs 绿晶服务

The clearest difference is update cadence: 绿晶服务 at every 10 days against 金不换OA管理系统's every 2 months. 绿晶服务 also leads on iOS requirement (9.0 vs 15.4). 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.

金不换OA管理系统 ships an update every 2 months, 绿晶服务 every 10 days. The most recent releases landed on September 20, 2026 and May 18, 2026 respectively.

## The numbers

| Metric | 金不换OA管理系统 | 绿晶服务 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Size | 16 MB | 41 MB |
| Requires iOS | 15.4 | **9.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [广州金不换科技有限公司](https://appshunter.io/developer/1464499311) | [Green Crystal Environmental Service Group Co., Ltd.](https://appshunter.io/developer/1474926448) |

## What reviewers say

### 金不换OA管理系统

[App page](https://appshunter.io/ios/app/oa/id1464620981)

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

**In-app purchases:** none


### 绿晶服务

[App page](https://appshunter.io/ios/app/id1474938537)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 金不换OA管理系统 free?

金不换OA管理系统 is free to download, with no in-app purchases.

### Is 绿晶服务 free?

绿晶服务 is free to download, with no in-app purchases.

### Do 金不换OA管理系统 or 绿晶服务 have ads?

Neither 金不换OA管理系统 nor 绿晶服务 shows ads.

### Which is updated more often, 金不换OA管理系统 or 绿晶服务?

金不换OA管理系统 ships an update every 2 months, and 绿晶服务 every 10 days. Most recently, 金不换OA管理系统 was updated on September 20, 2026 and 绿晶服务 on May 18, 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.*