Is there an iPhone app that writes your texts from your voice?

Is there any such app which will write what you say into the text box?
So that you can reply to a text when you can't use your hands?

It's the microphone thing next to the space bar

Your iphone does it on it own, ask Siri, then just tell him wht you want the messgae to say and say send.

Siri. Depends on if you have the iPhone 4S, 5 or 6 I you're from America. I'm from uk and I have the 5. You just hold in the middle button and tell it what you want it to do basically.

If you have the iPhone 4s it comes built in, it is next the the numbers button. But if you don't i don't think you can get it because the iPhone 4s has siri which is simmar software the the texting thing in the way it picks up your voice.

Voice Texting Pro in itunes

Siri already does this.

You can do it without an app providing you have an iPhone 4S and above. Otherwise there's no app unfortunately. If you have the newer models, then it is the microphone next to the spacebar. If it doesn't work then you do need Siri to be enabled.