Great information Pizzahhhhh. I would love it if maybe you created your own post with some of your other settings you use and what type of photos you are getting. I am always trying to find a good set up for pro mode or how to better my pro mode photos.
I'm glad the info was of use! I've ended up keeping the sliders where they are even for daylight usage.
The only other settings I'd recommend for more control would be using the raw mode for cleaner editing. I've not delved into that yet as I've only had the phone for a few days now, & switched from years of non-raw iOS, but will be looking into those options later today/this weekend. It'll be awesome if the Lightroom mobile app supports the raw files as that's what I use (the computer version) for all my sports work.
The shutter speed/iso/wb/af/ev/metering/af modes are all too variable to pick just one & leave it. I don't know if the WB will ever leave auto as the phone seems pretty accurate (once you modify the sliders to compensate for the overly warm tones), AF auto is fine since you have tap to focus for "manual AF".. unless it's super dark but I've yet to try focusing in dark environments.
Of course, some may prefer other settings or to leave the sliders as they come. I prefer/want/need as true to life as possible due to journalism ethics. Usually need to do minor edits after to correct exposure/highlights/shadows/contrast/sharpness, but unsure until I try the raw mode.
If you're shooting family/portraits/food/music/pets, etc, your sliders/filters will very well vary as you have more options to get creative, but if you want a clean realistic slate, the sliders are your best friend. There may be other camera apps that are more accurate with more functions, but I prefer the stock app & will keep my fingers crossed the double-click home button option will allow pro-mode someday (maybe there's an app to modify it without root.......)
However, I'd still usually use VSCO with a small amount of the K3 filter (love the Kodachrome tone) plus those same edits (exposure, etc.) in Instagram - but this version would not be used for news purposes. An earlier version of the photo would, as it had already gone through Photo Mechanic & Lightroom (no IG/VSCO filters) and sent off to be reviewed/edited/published.
I never bothered with attachment lenses for iPhones, but will probably look into them this time, specifically for wide angle usage, which I love... forces you to get close & intimate with your subject or provides a nice template for an environmental composition. Really like my new clear/soft case though so hopefully there's some compatible ones that don't force their own case (the Samsung one looks sick though).