Tamer:
I have used the following link for mobile projects.
IP:PORT/main/system/mobile?project=MyProject where MyProject is your project name.
You can also use this link in the forum to answer questions about direct links to client apps.
http://www.inductiveautomation.com/forum/viewtopic.php?f=70&t=4919
Your second question may be answered with the System tag that show the client OS. See attached Image.
Chris
