The iPhone can serve you well when you want to snap photos of celestial events and don’t have your equipment. The labels on the image above show additional stars that were invisible to the naked eye that became illuminated in the photo I took with the iPhone after adjusting the brightness, etc., of the photo.
Darkening allowed me to see that my phone captured more stars in the shot than what was visible to my naked eye. So, the next time you’re out on a clear night, take some photos and then edit out the light and see how many more stars you actually photographed but did not see with the naked eye. Have fun!