Is it possible to make repeatable fields? For example, if i wanted to make a list of passengers for a flight, could i have a group of fields that copies each time the user hits the "+" button, in order to make an entry for a second passenger?
No, I'm sorry. but you can do a similar thing with the checkboxes and conditions.
Example:
Field 1
Field 2
Checkbox1 to show field3,field4 and checkbox2
Field3 (like field1)
Field4 (like field2)
Checkbox2 to show field5, field6 and checkbox3
Field5 (like field1)
Field6 (like field2)
Checkbox3....