Social apps CSRs (Critical success factors) !

1. Social app should be viral & contagiousness in nature
2. Social app business idea should be social in nature eg. reviewing together 
3. Social app need to be  designed with scalable architecture, should be able to handle millions of users in case of success
4. Social app should be launched together on multiple social platforms like Facebook, OpenSocial, etc . so as to avoid to copycats.