An AEM 6 form can be consumed in a mobile device or a web browser running on a desktop. For example, consider a mobile user filling out the following AEM 6 form on an IPad device..
When the user clicks the Submit button, the form data is submitted to an AEM Sling Servlet. Once the data reaches the Sling Servlet, you can process the mobile data to meet your business requirements. For example, you can store it in a relational database, store it in the AEM JCR, or pass it to an AEM Workflow (just to give a few examples).
To read this development article, click http://helpx.adobe.com/experience-manager/using/posting-aem-6-form-data.html.