The form appears in half in iOS.

formulário aparece pela metade no IOS

 

Para acessar esse formulário é necessário clicar na parte inferior do site em Área técnica - ACESSO RESTRITO  depois colocar a senha     hex123

I checked this with iPhone 6S, iOS 9 and with Safari, the form appears to be responsive and not cut in half. What is your device model and its OS version? Let us know so we can check this further. 

I would also suggest injecting the following custom CSS codes to your form:

@media only screen and (max-device-width: 768px) {

.form-all {

-webkit-box-sizing: border-box;

-moz-box-sizing: border-box;

box-sizing: border-box;

}

}

Please follow the steps from this guide to inject the codes: 

https://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes