I tried to install this site as an App, but I didn't get that. So do we have this site as as App, or if we don't have then can we have this in future. I think this can help us to promote this site.
There are Stack Exchange apps that you can find in the App Stores, but I haven't seen any that I like.
Fortunately, Stack Exchange has a mobile version of their sites that work very well. Just visit sports.stackexchange.com on your mobile browser. I use it in iOS Safari on my iPod Touch all the time, and it works well.