What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Can you please provide further details about the app which will open up the form on a smartphone? From what I understand, you want the form to be easily opened on a smartphone. If that is so, I believe the Add to Home Screen Widget is suitable for your requirement. This widget allows you and your users to add the form as a shortcut to your phone's home screen so it can be easily opened from there.
Here's a demo form that you can check out: http://form.jotformpro.com/form/51414095714957?
If you are referring to a different functionality, please let us know so we may better assist you.