How can I connect my iCloud address book to my Contacts+ account?
If you're connecting your iCloud address book in the Contacts+ for Web app, you can do so from the home page of your Web app.
i) From the home page, click the 'Sync source; tab
ii) From the home page, click the [+] icon, then click Sync Source.
If you're connecting your iCloud address book from the Contacts+ for iOS app, Tap on [+] icon (home page), then tap 'Add Sync source'.
Another method is to click on Settings, then click 'Add Sync source'.
How can I make sure my iCloud address book is keeping my Apple device(s) synced with Contacts+?
If you have an OS X (Mac) or an iOS (iPhone/iPad) device, the easiest way to keep Contacts+ synced with your Apple device is through your iCloud address book.
Once your iCloud address book is connected and syncing with your Contacts+ account, you'll want to make sure it is also connected and syncing with your Apple device(s).
On your iPhone/iPad, go to your native Settings (gray gear/icon) -> click on Contacts -> make sure your iCloud address book is listed as an Account. Then, make sure syncing with Contacts is turned ON.
Does iCloud work with Apple’s two-step verification?
Yes. This article helps describe how to set up two-step verification.
Do Contacts+ tags sync with iCloud contacts?
Yes. The tags you create in Contacts+ sync bi-directionally with the groups you create in iCloud; vice versa, any changes/edits to a group in iCloud will update in Contacts+.