Being able to control whether or not to receive incoming calls on the app would be a great feature. I know it's available on the standard Acrobits app. Also, just for the record, the standard Acrobits app is $6.99 in the Google Play Store for Android so is also a paid app just like Bria. I would "assume" they are getting paid for this app somehow as well even if the charges are not passed on to us as users.