Connectivity: Web, bluetooth, etc

Hey to everyone,
is there a way to create apps for iOs, where I can control an arduino by ethernet or bluetooth? It seems to me that for now there is no connection option between Thunable x apps and the “internet of things” except of the block “open link …” which i can add to button blocks. But the problem with this is the fact, that it will open the webbrowser.

Do you know any solution?