New iphone models have a night mode. It looks like a moon on the top menu bar. It can be turned off, but if not turned off it activates when it detects low light situation. It appears to alter the shutter speed to get what it “thinks” is enough light. The top is with it turned off. The bottom is with it left to itself. Zoom in to see the difference in the noise in the two images. Night mode can also detect if it is on a tripod. It can then turn night into day, literally.
@ludwigsdiana That is actually how I got started using my iphone. My doctor said not to carry anything above my waist or it would damage my back. So I gave my Nikon to a godson and upgraded my iphone.
I am using my cell phone most of the time now. But mine is only a "middle of the road model" and I can tell I'll be tempted to get something even better next time out. That will be a while though! Good comparison.