# 氧券 vs 观云CloudObserver

The clearest difference is device support: 观云CloudObserver at 2 against 氧券's —. 氧券's advantage is iOS requirement (12.0 vs 26.2). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | 氧券 | 观云CloudObserver |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cloudobserver/id6797248046/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | — | No |
| Monetization | — | Free |
| Size | 143 MB | 6 MB |
| Requires iOS | **12.0** | 26.2 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Hangzhou yangquanTechnology Co., Ltd](https://appshunter.io/developer/1722034224) | [正兵 许](https://appshunter.io/developer/1512392584) |

## What reviewers say

### 氧券

[App page](https://appshunter.io/ios/app/id6472971312)

**In-app purchases:** none


### 观云CloudObserver

[App page](https://appshunter.io/ios/app/cloudobserver/id6797248046)

Record and explore the sky with this cloud observation app. Log cloud photos, weather, locations, and notes to build your personal sky journal. Enjoy a clean interface and offline access to core features.

**Highlights:** Record cloud photos and observations, Log weather, location, and notes, Build a personal sky journal, Clean and comfortable interface, Local data storage, Offline access to core features

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

**In-app purchases:** none


## Frequently asked questions

### Is 氧券 free?

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

### Is 观云CloudObserver free?

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

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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.*