This is a corporate message broadcasting application. Which will be used to by managers to communicate employees within their team. This require team and associated spacial team for within each team. Members can be invited in a team. And can be added into special teams.
Once that is done, message can be broadcasted to all members associated with a team and special team.
I am adding some key expectations that must be taken care of while designing as well.
Fresh, clean appearance (screen imagery so appealing people want to use this)
Simple navigation (all functions no more than 3 clicks or less away)
Intuitive (users tend to think the way the app works)
Incorporates the team communications vision.
Understand requirement and let me know if you have any query.
Ball Park Estimation of Time & Cost, based on information provided.