When you build a form with Formstack, a mobile-friendly version of that form is created for you automatically. There's no need to send people to the mobile version of your form. If we detect a mobile device, Formstack will display the mobile-friendly version of your form to that user. If they prefer, the user can switch back to the desktop version of the form by clicking on the link at the bottom of the form.
For additional information on using Formstack's mobile form builder, please read the following articles: