cool idea - sphere's social network will let users create groups to share interests, create campaigns.
I think this social network would be a suitable alternative to the currently social network.
when will mobile applications appear?
It's already out, you can download it in google play or apple store. The browser version is available as well.
If you look at the ratings in the Google Play Store their app seems to be very good. Many people like it and they wrote much positive feedback.