When this app is enabled, the phone will always ring at max volume for incoming calls from phone numbers you choose, even if the phone is set to vibrate or silent.

Suppose your child's daycare only calls when there is a problem. Add the daycare to the "Always Ring" list, and if daycare calls the phone will ring out loud regardless of your settings.

Suppose the phone is on the nightstand and set to silent while you sleep. Any phone number in the Always Ring list will cause the phone to ring loud (rousing you from your peaceful slumber).

Please note that this only overrides the ringer for incoming phone calls. SMS, chat, etc., are not affected.