After uncountable tries ....
At least I figured out, why I get the visualization on my computer and not on my mobile.
I was logged in my Thingspeak Account on my computer. And on my mobile not.
Is there no way, to get that work ?
To make this App public or view it with the help of the ReadKey ?
The working and looking of the App visualization is much better than the Matlab visualization and the working with that.
Any Ideas ? Thanks a lot !
Toni