Currently there are two ways to add contacts to a list in Robly.
From Contacts > Add Contacts and any import option you choose, you have the option of choosing an existing list to add contacts to, or creating a new one:
To add a single contact to a list, start by searching for that contact’s email address under Contacts:
Then click EDIT under the result:
Find the Lists section. Click +Add To List to add to a list, or the X in the list name to remove: