ContactSaver is a separate application created by CircleBack Inc. that was designed to work in tandem with the CircleBack app. ContactSaver uses intelligent email-signature-capture to parse incoming emails and create new contacts out of email signatures. When the two apps are used in conjunction, new contacts created by ContactSaver are automatically uploaded to CircleBack, analyzed, and kept up-to-date and accurate, always.
ContactSaver functionality can be found within the CircleBack app by using the Email Signatures feature. Connecting a Gmail account will initially scan email signatures from emails you have received to that account in the past 30 days to make suggestions regarding new contacts to add to your contact list. From that point forward, the app will regularly scan the signatures of new emails received to find new contacts.
For more information about signature capture functionality within the CircleBack app, click here.