First of all the users should keep in mind that digital zoom takes a toll on quality and resolution whereas optical zoom doesn’t. However, non-Pro iPhone models do not come with a telephoto lens.
Now almost every iPhone comes with built-in night mode. Use this feature when the light in the surroundings is light to preserve more details in the photos.
It captures fast-moving subjects by dragging the shutter button to the left or enabling the volume-up button for burst shots.
If you have the iPhone series, then you can enable the full 48 MP mode to get more detailed shots.
Users using iPhones know the it has multiple effects such as low-key, high-key, studio, etc. Do experiment to get better photos.
One should manually tweak exposure by tapping the (^) icon and adjusting the exposure slider.
When you enable the HDR it makes the photos retain more details, better color, and contrast. Use it to capture more lively photos.
iPhones have a macro mode for extreme closeups. All you have to do is take the phone close enough to the subject.