Listify add custom field data to map popup ( http://listify.astoundify.com/article/1044-add-custom-information-to-the-map-marker-popup )

functions.php

<?php

function smyles_custom_listify_listing_data( $data ) {
	
	// Set price key to value from get_custom_field (if there is a value).
	// This will allow you to use {{{ data.price }}} in /templates/tmpl-map-popup.php file
	if( $price = get_custom_field( 'price', $data['id'] ) ){
		$data[ 'price' ] = $price;
	}
	
	// Because we only set the key in $data array if there is a value, you can then use this in the tmpl-map-popup.php file:
	//	<# if ( typeof( data.price ) != 'undefined') { #>
	//		Price: {{{data.price}}}
	//	<# } #>


	return $data;
}

// Set priority to 11 to run our custom one, after the core Listify adds its data
add_filter( 'listify_listing_data', 'smyles_custom_listify_listing_data', 11 );

Hey there! Could this be applied to any field we add with the field editor?

For instance I have:
listing_date and listing_time?