Python Manage.Py
The app would be a new module in your project, let's say it would be a management system with human resources, financial modules, etc., so you would create an app for each of them to better organize, but nothing prevents creating everything in one app.Create a project only if it is something different.
I am very New to Python web development ,so got confuse while learning ,when we create new Project with the command --django-admin startProject 'ProjectName' 
It Created a project folder in my drive  and then we  create application in it  suppose with the name of "calculator", we start working in it ,
but after some more  requirement we have to  create a new different Project with the Name of the Hrms so the question arise for this again we have to run the same command django-admin startProject 'ProjectName' and then we have to create application in it or we  can create in it?