I'm not an advocate of using your iPhone flash. Mostly because it looks TERRIBLE.
But what about a wireless off-camera flash? HECK YES!
I've been testing out the Nova Flash for months now and I love it! It's the only flash for the iPhone that I can absolutely recommend.
Here's a video tutorial showing you how simple it is to use.
HINT: You just open the app, hold up the flash and shoot amazing portraits. 🙂