The newly unleashed app by Apple, Siri, has been carefully designed to simplify users' experience with sending messages. By using Siri on iPhone 4S, users can seamlessly use their own voice to schedule meetings and send messages. The app innovatively not only understands what the user says, but also knows well what they mean to talk back. Be it checking the weather, setting reminders, sending an email, finding information, or getting directions, Siri does it all. The app is currently in beta.