# 悠蓝壁纸 vs 4K Wallpapers

The clearest difference is in-app purchases: 4K Wallpapers at none against 悠蓝壁纸's 3. 4K Wallpapers also leads on update cadence (every 2 days vs every 10 days). 悠蓝壁纸's advantage is ads (none vs shown) and iOS requirement (13.0 vs 16.6). On price and device support there is nothing between them.

Both are free to download. 悠蓝壁纸 sells 3 one-off in-app purchases. 4K Wallpapers asks for nothing beyond the download.

悠蓝壁纸 ships an update every 10 days, 4K Wallpapers every 2 days. The most recent releases landed on November 3, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | 悠蓝壁纸 | 4K Wallpapers |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 10 days | **Every 2 days** |
| Size | 33 MB | 38 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 12+ |
| Developer | [阡陌四方(北京)科技有限公司](https://appshunter.io/developer/1708336653) | [Mazahr Kaleem](https://appshunter.io/developer/1489826395) |

## What reviewers say

### 悠蓝壁纸

[App page](https://appshunter.io/ios/app/id6467176867)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 悠蓝壁纸会员6个月套餐 | $2.99 | one-time |
| 悠蓝壁纸12个月会员套餐 | $3.99 | one-time |
| 悠蓝壁纸永久会员套餐 | $6.99 | one-time |


### 4K Wallpapers

[App page](https://appshunter.io/ios/app/4k-wallpapers-hd-wallpaper/id6741789491)

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

**In-app purchases:** none


## Frequently asked questions

### Is 悠蓝壁纸 free?

悠蓝壁纸 is free to download, with in-app purchases available.

### Is 4K Wallpapers free?

4K Wallpapers is free to download, with no in-app purchases.

### Do 悠蓝壁纸 or 4K Wallpapers have ads?

4K Wallpapers shows ads; 悠蓝壁纸 does not.

### Which is updated more often, 悠蓝壁纸 or 4K Wallpapers?

悠蓝壁纸 ships an update every 10 days, and 4K Wallpapers every 2 days. Most recently, 悠蓝壁纸 was updated on November 3, 2026 and 4K Wallpapers on November 2, 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.*