One screen should be enough

Uhhh, OK.

The current app already does, doesn’t it?

Select the browse tab (second from left).

On the Now Playing screen touch the volume control. The popup shows the individual levels of grouped rooms as well as the master volume.

The app is a “click here, and then here, and then like this...”

The Browse.. doest not browse music, it browse Input connections.

The Now Playing, does as you say, but requires two presses.

Best example is the absence of a timer.

An alarm is not a timer!!!

The app is very much an excersize in Minimum Viable Product design. Fine as a start, but no substantial improvements for a decade.

I think that the interface design is heavily influenced by Apple philosophy. As such there will be minimum visible elements, large graphics, and lots of scrolling and drill down. Unless this scheme is followed, there will be volumes of complaints from Apple users who always claim to know best when it comes to user interface. Personally, I prefer more screen elements and less drill down.

Have you investigated Sleep Timer?

Apple? Sleep timer?

I'm commenting on the Sonos App, that is an integral part of the Sonos speakers.

It is not “simple”, it is cheaply made. A rock is not “a hammer designed by Apple”

Anothe example, it have settings spread all over the app, but no possibility for locking it down, or at least a way to reset to a defined default setting.

You asked about a timer.  @buzz pointed you to the sleep timer function:

https://support.sonos.com/en-us/article/set-a-sleep-timer-on-sonos

Which you seem to be handwaving away.

Now I will point out that there is a way to reset to defaults (two ways, actually):

https://support.sonos.com/en-us/article/reset-your-sonos-product

https://support.sonos.com/en-us/article/reset-the-sonos-app

And a way to lock down settings (reset the app as above and don’t log in) and you will handwave those features too.  I think we know what you are about.

I’d decided not to feed this one any more.

When missing functionality is dismissed with workarounds, and there is no destinction between configuration and settings, then the Sonos App is what is deserved.

And I don't want to reset to Sonos defaults, I want to reset to my defaults.. as I wrote.

But I guess realising what is crap, is hard when invested heavily. It is called loss-avoidance.

🙄