# 优化学习数字资源 vs 数独世界

The clearest difference is in-app purchases: 数独世界 at none against 优化学习数字资源's 10. 优化学习数字资源's advantage is ads (none vs shown) and update cadence (every 6 weeks vs every 3 months). On price and device support there is nothing between them.

Both are free to download. 优化学习数字资源 sells 10 one-off in-app purchases. 数独世界 asks for nothing beyond the download.

优化学习数字资源 ships an update every 6 weeks, 数独世界 every 3 months. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 优化学习数字资源 | 数独世界 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/id1457659415/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Size | 293 MB | 110 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Beijing Zhihuiliu Education Technology Co., Ltd.](https://appshunter.io/developer/1033400900) | [振宇 于](https://appshunter.io/developer/1376588969) |

## What reviewers say

### 优化学习数字资源

[App page](https://appshunter.io/ios/app/id1457659415)

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

**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 |


### 数独世界

[App page](https://appshunter.io/ios/app/id6777591474)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 优化学习数字资源 free?

优化学习数字资源 is free to download, with in-app purchases available.

### Is 数独世界 free?

数独世界 is free to download, with no in-app purchases.

### Do 优化学习数字资源 or 数独世界 have ads?

数独世界 shows ads; 优化学习数字资源 does not.

### Which is updated more often, 优化学习数字资源 or 数独世界?

优化学习数字资源 ships an update every 6 weeks, and 数独世界 every 3 months. Most recently, 优化学习数字资源 was updated on October 6, 2026 and 数独世界 on October 10, 2026.

---

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