Does the form displays on the Facebook mobile app?

is this app be showed on mobiles (ios , android ) ?

Do you mean to ask if your JotForm displays on the Facebook page when it is viewed from a mobile app? If so, unfortunately, Facebook tabs are not supported to view on the mobile devices. However, you may consider using custom iFrame tabs to embed the form on your Facebook page which should be working fine. Please go through the guide below for more instructions on using Custom iframe app.

https://www.jotform.com/help/82-Adding-a-form-to-Facebook-Custom-iFrame-App-

Hope this information helps! Let us know if you are referring something different. We will be happy to help.