***Please note that you will still get an alert/prompt before the message can go out. The app would need to use a "SMS Gateway" which would not show your phone number as the sender. Hence the app is ad-supported. Apple restricts the ability to bypass the alert via the MFMessageComposeViewController class, see 'http://stackoverflow.com/questions/10848/how-to-programmatically-send-sms-on-the-iphone' for an explanation.
Never miss another opportunity to wish someone a happy anniversary, birthday, holiday, Christmas, New Years, et al.
Recurrence/repeat option allows you to choose hourly, daily, weekly, monthly or yearly.
Create, save and re-use pre-written messages.
Upgrading the app keeps any saved data such as new pre-written messages and groups.