# KNF WAS@SG vs CloudySky2

The clearest difference is update cadence: CloudySky2 at every 4 days against KNF WAS@SG's every 3 weeks. KNF WAS@SG's advantage is iOS requirement (15.1 vs 26.2). 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.

KNF WAS@SG ships an update every 3 weeks, CloudySky2 every 4 days. The most recent releases landed on November 8, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | KNF WAS@SG | CloudySky2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cloudysky2/id6758897251/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | — | Free |
| Size | 24 MB | 83 MB |
| Requires iOS | **15.1** | 26.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [KNF Enterprises Pte Ltd](https://appshunter.io/developer/1829709004) | [Wonder Valley Software](https://appshunter.io/developer/443064529) |

## What reviewers say

### KNF WAS@SG

[App page](https://appshunter.io/ios/app/knf-wassg/id6742532381)

**Features:** macOS Compatibility

**In-app purchases:** none


### CloudySky2

[App page](https://appshunter.io/ios/app/cloudysky2/id6758897251)

Identify and learn about different cloud types with this pocket field guide. Explore detailed information, view stunning photos, and log your own cloud observations. Enhance your appreciation of the sky around you.

**Highlights:** Cloud identification guide, Detailed cloud characteristics, Photo index of cloud types, Cloud formation explanations, Weather map symbols chart, Cloud observation logging, Annotate photos with notes

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

**In-app purchases:** none


## Frequently asked questions

### Is KNF WAS@SG free?

KNF WAS@SG is free to download, with no in-app purchases.

### Is CloudySky2 free?

CloudySky2 is free to download, with no in-app purchases.

### Do KNF WAS@SG or CloudySky2 have ads?

Neither KNF WAS@SG nor CloudySky2 shows ads.

### Which is updated more often, KNF WAS@SG or CloudySky2?

KNF WAS@SG ships an update every 3 weeks, and CloudySky2 every 4 days. Most recently, KNF WAS@SG was updated on November 8, 2026 and CloudySky2 on November 13, 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.*