Send your Dad a pre-recorded voice or text message this Father's Day
Information is submitted
We’ll ask you to enter your phone number, email address, and a time that you’d like to schedule your voice or text message to your dad.
You receive a call
A phone call is made via the Zang Father’s Day app to your number; this will allow you to set up your pre-recorded voice call or verify your text message.
Your Dad Receives the message
Your Dad receives, either your pre-recorded message or a text message, on the date and time you selected.
So it's not magic after all, it is just an API. But it's pretty cool.