Trying out the app MixCaptions for iPhone (iPhone only, sorry) , which automatically captions your video. http://pelpina.com (check my site to download my free "smartphone video like a pro" ebook!)

Amazingly accurate transcription, including commas and periods (check video)
the app supports a ton of different languages
You can change the fonts, color and background
it even allows you to change the canvas size (square, vertical, landscape, etc)
you can also delete the MixCaptions logo and add your own logo for 4.99
the app works with credits, I paid around 5 dollars for 60 minutes

Let me know what you think of this app! Leave a comment!