SketchUp Viewer for IOS Layers not Tags

I recently downloaded the SketchUp viewer for i-Phone and plan to make use of it in future projects collaborating with a lady that is a non-SketchUp user.

I’ve noticed that Layers terms are still implemented in the app despite the recent name change to Tags. Should this have been changed to be consistent with other SketchUp products?

Also, the icon for the current termed “Layers” is that of three stacked rectangles. Which suggests hierarchy to me but “Layers/Tags” in SketchUp do not have hierarchy. I (at least) find the icon misleading.