Camera lens should be cleaned regularly

In order to ensure that you get the best pictures, it is important to make sure that lens of the camera is not dirty or smudged. You also need to check for smudges or debris on the iPhones lens.

Use of digital zoom should be avoided or restricted

There are fixed lens featured on the iPhones, this does not feature the optical zoom. If you look at it, the digital zoom is not even a zoom; it is just about blowing up the images after they have been cropped. Images that are digitally zoomed tend to be pixelated and grainy.

Move closer to the subject

Instead of using the digital zoom feature, what would be best is to go closer to the subject that you wish and take a picture, this will help you get a really good shot as well as you do not have to use the digital zoom feature.

Zoom in and lock the focus

To benefit more of your photos, it would be advisable to go ahead and digitally zoom in and lock the focus on the frame especially on a particular that you want. After you have zoomed in and locked the area within the frame, then you can zoom out and take out your photo.

Adjust the exposure manually

Though there is a fixed aperture feature on the iPhone, it is also possible that the exposure can be fixed by changing the shutter speed values and ISO. You need to rely on the exposure slider as there is no individual control.

AE/AF Lock needs to be used

You can tap and hold the viewfinder instead of tapping to focus. This will help to lock the focus and exposure and while it is locked, the exposure slider can be changed to maintain the locked focus and changed the exposure.

Control the shutter with the remote of the Ear Pod or volume buttons

For still photos, the biggest enemy is movement; this is why the optical image stabilization feature is available. While taking the photo, you can go ahead and reduce the movement by using the volume buttons that are physically present. It is even better to go ahead and connect the Ear Pods and with the help of the remote control the volume buttons for invoking the shutter.

For better stability yes the monopod or tripod

The monopod or tripod can be used to mount the smartphone for better stability; there are universal mounts that can be used so that the iPhone can be mounted to the tripod.

Burst mode should be used

IF the subject you wish to capture moves a lot, the burst mode can be used so that it can enhance the chance of you taking out a photo that can be used during the shooting session.

HDR can be used

Another way to get great photos is by going ahead and using the High Dynamic Range or HDR, this can be used directly from the app of the Camera and works by using three different exposures with three different photos.