The Home screen
Home lists the Sites you are allowed to work on, with each site's ID and status (for example CIM-02 · Attention Needed). Use the magnifier to search when the list is long; a site's ⋮ jumps straight to its Users or Submissions.
Across the top:
The project pill shows which project you are in. Tap it to open Projects and switch - every project you belong to is listed, each with its own sync icon.
ⓘ opens the project summary: number of sites and users, when it was last updated, and TOTAL CASES split by status.
The bell opens your notifications (see Notifications on your phone).
Your avatar opens your profile sheet: Account Settings, About the App and Sign out.