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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.