Fontsize of Listpicker elements is to large.

The fontsize of Listpicker Elements on my Samsung S2 looks rather big, but  on my Samsung Galaxy 10 it looks much to big.

Is there a possibility now to change the fontsize?

But everything else I like a lot. It is fun to make Apps with MIT App Inventor 2.

you can't change the fontsize, but you could try AppToMarket and set the screen to "Any"

see also here App Inventor and the Screen Size