# OpenK vs 卡片星球

The clearest difference is update cadence: 卡片星球 at weekly against OpenK's every 6 weeks. OpenK's advantage is iOS requirement (9.0 vs 12.0). 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.

OpenK ships an update every 6 weeks, 卡片星球 weekly. The most recent releases landed on October 25, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | OpenK | 卡片星球 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Size | 112 MB | 189 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Beijing Ingcare Technology Co.,Ltd.](https://appshunter.io/developer/1266130654) | [深圳市悦道科技有限公司](https://appshunter.io/developer/1571066605) |

## What reviewers say

### OpenK

[App page](https://appshunter.io/ios/app/openk/id1462608304)

**Features:** macOS Compatibility

**In-app purchases:** none


### 卡片星球

[App page](https://appshunter.io/ios/app/id1627398443)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OpenK free?

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

### Is 卡片星球 free?

卡片星球 is free to download, with no in-app purchases.

### Do OpenK or 卡片星球 have ads?

Neither OpenK nor 卡片星球 shows ads.

### Which is updated more often, OpenK or 卡片星球?

OpenK ships an update every 6 weeks, and 卡片星球 weekly. Most recently, OpenK was updated on October 25, 2026 and 卡片星球 on November 3, 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.*