How do I add/delete contacts to Talkatone ?

The Talkatone app can only display contacts from your local phone book. When you add contacts to your Contacts app (on your device), they will show in Talkatone.

If you wish to add/delete/edit contacts, then you have to add/delete/edit these contact's details directly to/from/on your Contacts app (on your device).

The next time you restart the app, the contact's details will update on Talkatone.