How To Create A New Gmail Contact Or A Yahoo Mail Contact From Android Device

I would like to create a new Gmail contact or Yahoo mail contact from my Android device. It's a Samsung Galaxy S4 running Android 4.4.2. I've tried looking in the Yahoo mail app, the Gmail app, and the Google+ app on my phone, but I can't find any options to create a new contact. I would prefer not to create the contact on my phone, since I've been having trouble exporting all of the device contact information to my Gmail and Yahoo mail accounts (specifically, it doesn't seem to send the groups that the contact is a member of). Any help would be much appreciated, even if only to say that this is not possible or that it requires a 3rd party app.