@Timo-Martosatiman-MRA
It depends on Smartphone dimension how easy you can recognize the digits in the icon. So, if you believe ther is no speed limit, an icon on screen will shock you. This is a unnecessary risk during riding.
At other side, in Germany we have not really no speed limit - we have "reporting speed" (German Language: Richtgeschwindigkeit) - means you should not drive much faster and not much slower than 130 Km/h.
You may than Show (in Germany) this icon on screen:
But this will make it more complicated. So, better will be no icon