The most interesting piece in the film for me was the camera lens. I like this technology that you can add to your iPhone because its good for different occasions like when you want to get a wide aspect ratio you can get more in your picture than usual with no lens.
I have researched few companies but PhotoJoJo seems to be the best one with quality lenses and you can buy them either separately or in a whole pack like shown in the picture below.
In this video there is an explanation of what an image looks like with the lenses – https://www.youtube.com/watch?v=MnGVNr4lXMw
I would like to buy only one and that would be the Wide & macro lens because its practical when you want more detail up-close or get more in one picture.