JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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.
As I check the information on PayPal Here allows to integrate with iOS and Android Apps by the SDKs made available by PayPal. Since JotForm is a web based form builder that works on browsers, I don't think this can be integrated. Alternatively, you may consider using normal PayPal/PayPal Pro integration on the forms.
Hope this information helps! Please let us know if we can be of any further help. Thank you!