I simply wave it around vaguely and hey presto
Thats one smart light meter working away here. Not to mention the colour balance. To do this with my Canon requires tripod and some rather clumsy third party software but even then it would be obvious it's several piccies stitched together.
I recently took some shots of the latest 'supermoon'. I had to read the manual for ten minutes to remember how to step the exposure down and then I needed to use my software to try and tease out the detail.
My mate merely held his phone up and ........