# 青于蓝 vs 优乐学习

The clearest difference is update cadence: 青于蓝 at every 3 weeks against 优乐学习's every 14 months. 青于蓝 also leads on iOS requirement (13.0 vs 15.0). 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.

青于蓝 ships an update every 3 weeks, 优乐学习 every 14 months. The most recent releases landed on October 25, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 青于蓝 | 优乐学习 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 47.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 14 months |
| Size | 129 MB | 240 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Beijing Home Call Express Data Technology Co., Ltd.](https://appshunter.io/developer/990703582) | [Xuan Zhou](https://appshunter.io/developer/1534790034) |

## What reviewers say

### 青于蓝

[App page](https://appshunter.io/ios/app/id1404817237)

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

**In-app purchases:** none


### 优乐学习

[App page](https://appshunter.io/ios/app/id1552698997)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 青于蓝 free?

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

### Is 优乐学习 free?

优乐学习 is free to download, with no in-app purchases.

### Do 青于蓝 or 优乐学习 have ads?

Neither 青于蓝 nor 优乐学习 shows ads.

### Which is updated more often, 青于蓝 or 优乐学习?

青于蓝 ships an update every 3 weeks, and 优乐学习 every 14 months. Most recently, 青于蓝 was updated on October 25, 2026 and 优乐学习 on October 7, 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.*