With the 1.17 release Iris becomes The Iris Suite.

The all new Contacts application supports synchronizing contacts from CardDav services, including Google Contacts, iCloud Contacts or any other compatible service like Runbox, Synology, etc. When set up, Iris will link the email addresses to Contacts in order to display any configured photos and other details. Contacts are also used to provide better matches when filling out addresses in To/CC/BCC fields.

Contacts will automatically be installed in the same directory as Iris when you auto-update to 1.17.