How do Firewall calls appear in my iPhone's call log?
Missed calls from your whitelist will show up in the your iPhone’s call log in red text. All outbound calls placed from within the app will also show in your iPhone’s phone app. You’ll see a grey phone and arrow icon to the left of the calls that have gone through Firewall in the call log.
You won’t see any Blocked calls or Spam calls in your iPhone's call log.