1. Navigate to your homepage in the preview area.
2. Drop your app onto the homepage of your site.
3. Select "Only Some Pages" from the dialog box that opens up.
4. In the Filters area, next to the line that reads "SHOW ON yourdomain.com", choose "Only after this URL". This means that the app will be added to all pages underneath the current one.
5. Click Publish, and you're done!