WindowViewer vs Knauf StarKlub
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
WindowViewer
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You are wondering how different colored windows will look in your home or how a new sliding door will look on the living room wall? When renovating you ask yourself many questions that are often difficult to answer when your own imagination is lacking. With the WindowViewer app, you can now answer these questions visually. Choosing new windows and doors has never been so easy: With the WindowViewer app, you can now quickly and easily visualize windows and doors and place them in your home using AR (augmented reality). This gives you a playful way to get a better impression of different window types, shapes, colors, etc. WindowViewer is the augmented reality app for window visualization: Using modern AR technology, you can easily visualize window elements in your immediate surroundings via your smartphone or tablet with the WindowViewer app. Place selected window and door elements in the preferred location in the room and change the desired parameters in an instant: Shapes, colors, handles, window sills, etc. Everything can be customized by you! Technical requirements: You need an internet-enabled smartphone or tablet to use the app. No registration is required for visualization. Never before has the selection of windows and doors been so easy to use. Just try it out!
Knauf StarKlub
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The Star Klub loyalty program is tailored to reward the hard work of Installers. Earn points by uploading invoices and participating in campaigns. Points can be redeemed for exciting rewards like products and vouchers. The Star Klub App features: โข Seamless sign-up & OTP login โข Receive points on each invoice upload โข Redeem rewards (vouchers or products) โข Stay updated with the latest campaigns Join Star Klub today and start earning rewards!
Screenshots
Verdict
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.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
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.
| Parameter | WindowViewer | Knauf StarKlub |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 5 weeks โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 โ better | 15.0 |
| Further details โ not scored | ||
| Size | 138 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | Digital Building Solutions GmbH | Knauf India Private Limited |
In-app purchases
WindowViewer
No in-app purchases
Knauf StarKlub
No in-app purchases
Questions
Is WindowViewer free?
Is Knauf StarKlub free?
Do WindowViewer or Knauf StarKlub have ads?
Which is updated more often, WindowViewer or Knauf StarKlub?
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