As we are all now apt to have a mobile device with a camera with us at all times these days, it has never been more true that "the best camera is the one you have with you!"
With that in mind, I am always keeping my eye out for an iPhone add on that can make bring the iPhone just a bit closer to the feature set of an SLR without all the bulk and hassle of lugging around an SLR and all the gear that goes with it.
The Wirecutter has a nice review of the current slate of lens options for the iPhone and had chosen The Moment as their top pick. In their mind, it has the best combination of quality, usability, features, and price. Each lens comes with at mount that "sticks on" the back of your phone if you want to keep your phone simple and clean and still use a lens. They also offer a nicely designed case for a more sturdy lens adaptor as well as a protective case for your phone.
Take a look at the video below to learn more about how it works and check out the detailed review at the WireCutter as well to learn more about other lens options for your iPhone.