Access Perch Template Var inside App

Hello,

I'm trying to create a Shortcode App that will display a button

But the button needs different actions depending on a Page Attribute

On page templates I use

$enquiry_form_embed = perch_page_attribute('enquiry_form_embed', array(
            'template' => 'body_attributes.html'
        ),true);

And works perfect

But how do i access the same data in an APP

Thanks