When you have invested time building your app, you may want to make a copy of your app project. To do so, just select 'Make Copy.' A copy will automatically be generated and appear in your project page.
You can make a copy of your project while you're working on it by clicking the project actions menu in the top right hand corner and selecting Duplicate Project.
Copy from your Projects Page
You can also make a copy of your project from your projects page. Click on the menu and choose "Duplicate" to create a copy.