# 青于蓝 vs Rensa Lab

The clearest difference is in-app purchases: 青于蓝 at none against Rensa Lab's 1. 青于蓝 also leads on iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Rensa Lab sells 1 one-off in-app purchase. 青于蓝 asks for nothing beyond the download.

## The numbers

| Metric | 青于蓝 | Rensa Lab |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 47.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 129 MB | 19 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) | [INPHIL CHOI](https://appshunter.io/developer/6785766361) |

## What reviewers say

### 青于蓝

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

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

**In-app purchases:** none


### Rensa Lab

[App page](https://appshunter.io/ios/app/rensa-lab/id6818004063)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Problems | $2.99 | one-time |


## Frequently asked questions

### Is 青于蓝 free?

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

### Is Rensa Lab free?

Rensa Lab is free to download, with in-app purchases available.

### Do 青于蓝 or Rensa Lab have ads?

Neither 青于蓝 nor Rensa Lab shows ads.

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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.*