The design in iOS, Windows, etc, is very user-unkindly. Dark gray, tiny font on a dark background is difficult to read. Some is not readable! All the colors are washed out and dark. Why is everything so dark? If someone of the screen is too bright, you can reduce the brightness of the screen! If the rectangles are colourfully is not to be read any more. The inscriptions below the sliders are also too small.