# WindowViewer vs Knauf StarKlub

The clearest difference is update cadence: Knauf StarKlub at every 5 weeks against WindowViewer's every 3 months. WindowViewer's advantage is iOS requirement (12.0 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.

WindowViewer ships an update every 3 months, Knauf StarKlub every 5 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | WindowViewer | Knauf StarKlub |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Size | 138 MB | 40 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Digital Building Solutions GmbH](https://appshunter.io/developer/1456095004) | [Knauf India Private Limited](https://appshunter.io/developer/1650518908) |

## What reviewers say

### WindowViewer

[App page](https://appshunter.io/ios/app/windowviewer/id1606181528)

**In-app purchases:** none


### Knauf StarKlub

[App page](https://appshunter.io/ios/app/knauf-starklub/id6443911324)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WindowViewer free?

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

### Is Knauf StarKlub free?

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

### Do WindowViewer or Knauf StarKlub have ads?

Neither WindowViewer nor Knauf StarKlub shows ads.

### Which is updated more often, WindowViewer or Knauf StarKlub?

WindowViewer ships an update every 3 months, and Knauf StarKlub every 5 weeks. Most recently, WindowViewer was updated on November 3, 2026 and Knauf StarKlub on November 3, 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.*