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Yes. But we advise to keep the form default formatting, such as the basic theme and the field alignments. There are themes from our form template gallery that doesn't work best with mobile devices. However, if you want to use it and make it mobile responsive, that is possible with injecting a custom mobile CSS query to the form.
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It has been for a while you have written here but I also would like to add Welvin's answer to this link, we do have widgets for almost anything you may need in your forms.
Have a great day