The Superchat mobile app allows you to import contacts directly from your phone, so you can quickly start conversations without having to add them manually.
Instructions
Open the Superchat mobile app
Select You in the bottom right corner and then tap Import contacts
You will then be taken to your iPhone settings. Select Contacts.
Then select Full access.
Finally, in the ensuing pop-up window, select Allow full access.
Your contacts will now be imported into Superchat. If you do not wish to import all of your contacts, you can of course choose Limited access and manually select which contacts you would like to import.