# 孩有为数字资源 vs OpenK

The clearest difference is in-app purchases: OpenK at none against 孩有为数字资源's 10. OpenK also leads on iOS requirement (9.0 vs 12.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 孩有为数字资源 sells 10 one-off in-app purchases. OpenK asks for nothing beyond the download.

孩有为数字资源 ships an update every 5 weeks, OpenK every 6 weeks. The most recent releases landed on October 5, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 孩有为数字资源 | OpenK |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 6 weeks |
| Size | 335 MB | 112 MB |
| Requires iOS | 12.1 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Beijing Zhihuiliu Education Technology Co., Ltd.](https://appshunter.io/developer/1033400900) | [Beijing Ingcare Technology Co.,Ltd.](https://appshunter.io/developer/1266130654) |

## What reviewers say

### 孩有为数字资源

[App page](https://appshunter.io/ios/app/id1346374923)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 12个月时效课程I使用权 | $4.99 | one-time |
| 12个月时效课程J使用权 | $6.99 | one-time |
| 12个月时效课程M使用权 | $8.99 | one-time |
| 12个月时效课程L使用权 | $9.99 | one-time |
| 12个月时效课程H使用权 | $11.99 | one-time |
| 12个月时效课程N使用权 | $12.99 | one-time |
| 12个月时效课程P使用权 | $23.99 | one-time |
| 12个月时效课程E使用权 | $29.99 | one-time |
| 12个月时效课程F使用权 | $46.99 | one-time |
| 12个月时效课程G使用权 | $59.99 | one-time |


### OpenK

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 孩有为数字资源 free?

孩有为数字资源 is free to download, with in-app purchases available.

### Is OpenK free?

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

### Do 孩有为数字资源 or OpenK have ads?

Neither 孩有为数字资源 nor OpenK shows ads.

### Which is updated more often, 孩有为数字资源 or OpenK?

孩有为数字资源 ships an update every 5 weeks, and OpenK every 6 weeks. Most recently, 孩有为数字资源 was updated on October 5, 2026 and OpenK on October 25, 2026.

---

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