Some cell phone providers have an android app that will send you an email if someone calls you but your smartphone is out of reach or if the caller leaves a message. But if your smartphone is up and running , nobody answers, and no message is left so their solution fall flat.
This application is here to fill this gap and will notify you of those missed phone calls. All you need to do is fill your email.
Of course if your smartphone is not connected or has no data connection, no notification will be sent.