Yes it is possible to backup your application with data. However this feature is available from the Standard Edition onwards only. You can back up your application design along with the data. To back up an application:
- Click on Account Settings link displayed on the top right of the home page.
- Click on the "Back Up" tab from the list of tabs displayed.
- Click on the "Start New Backup" button displayed in the right corner.
- The pop up that is displayed, the dropdown next to Select Application.lists all the applications created under your account.
- Select the application that you wish to back up and click "Backup Now".
- The application will be listed under the "BackUp Under Progress" tab.
- Once the "Back Up" is completed, the application will be listed under the "Completed Tab" in the same screen.
You can Back up the application at various stages. Each time it will be backed up as a new version