I can’t remember where I read it, but as far as I know, the rotate “feature” (switching between normal and graph screen by rotating the phone) is no longer available, as it has been replaced by the graph button sometime in the history.
Most of the product videos were obviously produced in an early stage of development and are seemingly not closely reflecting the actual behaviour of the mooshimeter and app, which might be confusing to new users.

You can’t change the color, I’ve asked the same question two month ago.

But seems that you never got an answer, right?

The black background is the IOS version.

Really? The background color is detminined by the OS? WTF? I don’t understand the sense.

And yes, I would also highly prefer an eye-friendly black background as shown in a lot of videos. (Or maybe switchable, to satisfy all needs once and for all… ;-) )