S Voice For Galaxy S3 is The Rival For Apple Siri
If you are use another android phone you can choose siri alternatives app : siri alternatives apps for android
What is S Voice ?
Samsung has improved the experience to compete with Apple's Siri. For example, s voice allows you to unlock your phone with a verbal command, customizable, and then receive instructions in order to upload applications, change calendar appointments, do research or do other tasks just by talking on the phone.
"How is the weather today?", "take a picture" and "Cheese!" Are all supported commands. If you're listening to music, you can tell S Voice to jumping, go back, play and pause put a song and many other commands.