There are 3 User types:
Administrator - has full account authority
Portal User - has access to both the App and the Web Portal. The Administrator can decide what access, visibility and permissions the Portal User has.
- Field User - has access to the mobile App only. The Administrator can decide what access, visibility and permissions the App User has.
The first user created on the account will be a Super Administrator this type of user will have by default, ALL permissions enabled and locked so that they cannot be deselected. There is no difference between a Super Administrator and an Administrator with all permissions enabled.