In fact, it is an application similar to facebook. So all the necessary features for a social network (creation of profiles, groups, comments, like, live chat, events, sharing, hashtags, emoticons, messages, status, instant notifications, request of friends, public / private publications, click- to-call, sending SMS to friends, etc.
Allow offline text postings like on Whatsapp and publish them immediately as soon as the user is logged in.
Allow accessibility of certain data of the application in offline mode.
Also allow users to create personal and business pages.
Integrate an advertising system like facebook that will allow sponsored content, with a payment system by Paypal, Visa, etc.
If possible, integrate a facial recognition system (this option is according to your abilities and not necessarily necessary in the short term)
The applications must be in French, so provide a translation file.
For quotation, make us a proposal and we will discuss it. The design is according to your inspiration.