Grau vs Viascenario
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Grau
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The Grau app is the easiest and most intuitive way to control your Grau luminaires. At the tap of a finger, you can create and program ideal light settings for every mood, space, time and situation. Program and group your lamps in one view: The Grau app lets you see all your Grau lamps in one view, build lamp groups, and program both individual and group settings. With a tap or slide of your finger, you can switch lamps on and off, adjust brightness, and tune color temperature. Create and name groups according to room or situation, and coordinate dimming, color, and temperature settings. Program your lamps via gallery view: For visual control of your lighting, take a picture of your lamp(s) and room(s), save in the Gallery, and integrate luminaire control in the photo(s). Create and time-set light settings and scenes: Use the Grau app to program and save light scenarios for every mood and situation. Set the light right for working, meeting, dining or downtime and save the settings as a scene. Then simply select the scene you need with one tap. Grau timer function lets you configure lamps and lighting scenes according to time, date, or sunrise / sunset. Share your light network and lighting control: Grau has four different levels of sharing and access control. You can decide if your network is open to everyone, or if others need a password to access. If you have several users and devices using the same network, all changes made with one device will be automatically updated to the other devices via the Grau cloud service.
Viascenario
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make your space your own theatre. Viabizzuno’s wireless lighting control system by casambi allows you to control your light with a simple touch. individually or in group, from your mobile or tablet, you can simply manage your luminaires, create light scenarios, and direct them for different occasions or settings to produce a striking coup de théâtre. by searching for all casambi-ready Viabizzuno’s light solutions, you can create an endless number of scenarios from an intuitive and customizable app. lift the curtain on your stage, download Viascenario.
Screenshots
Verdict
Grau and Viascenario are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Grau ships an update every 3 months, Viascenario every 2 months. The most recent releases landed on September 10, 2026 and June 24, 2026 respectively.
| Parameter | Grau | Viascenario |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod, Apple Watch | iPhone, iPad, iPod, Apple Watch |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 33 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Grau GmbH | Viabizzuno S.p.A. |
In-app purchases
Grau
No in-app purchases
Viascenario
No in-app purchases









