Best SMS autoreply app for Android?

I currently use hello as my SMS app of choice but I am looking for a functionality that it doesn't seem to have. Is there an app people use to notify people who text them that they are driving and can't look at their phone at the moment? I cannot find a popular app or one from a reputable source that claims to be able to do this. I would prefer one that can detect that the user is in a moving car but this is not a necessity. Thanks.