Create Custom App Properties in SharePoint Office 365

Step 1: Create a SharePoint hosted app using Visual Studio 2013.

File -> New -> Project,



Step 2: Select app for SharePoint. Enter the name of the project and click Ok.



Step 3: Select SharePoint hosted and click next button.



The solution structure shows as follows.



Step 4: Right click Project -> Click Add -> click New Item,



The following screen will appear. Select Client Web Part and enter the name of web part. Click Add.



Click Finish to continue.



The solution structure looks as follows.



Go to element.xml page under DemoApp.





In custom App properties here I set App name and list name in properties tag as follows,