I would like to develop an app for iOS (iPhone/iPad) and Android that only sends an SMS message. I want the user to initial type in his details such as ID name address...etc and the app saves it. After first time registration, he can type an SMS message then send it to a predefined number and the app retrieve his registered details and append it to the SMS message. That's all it is simple.
Of course some attentions needs to be paid to the UI design because it's quite important.