@rikschennink not sure if camera app on Samsung Galaxy series is the Android default, but on those you can set it the mode to pro and set everything manually. You might need a gesture to access it.
I generally distrust third party stuff more than vanilla apps 😛
@timsev i don’t think this can be done with iOS unfortunately. I purchased FiLMiC, horrible interface, but can fix focus and color temps, result is quite okay.