Why are the photos taken by iphone indoors so dark?

Hello, I'm glad to help you answer your questions.

Apple owns the patent of Tap on focus (most mobile phones are copied from iPhone at present), that is, you can click anywhere on the screen with your finger in the camera interface to focus.

After you turn on the camera, tap the dark part with your finger, and the iPhone will automatically fill the light and focus, and the dark part will be photographed clearly.

If you want to take clear photos in dark and bright places, you can click the dark place with your finger, then turn on HDR and take photos. Don't take your mobile phone away when taking pictures, you will find the difference after taking pictures.

At present, the camera function of most mobile phones is not as good as that of iPhone, because the white balance processing of iPhone is better than other mobile phones (including Samsung S5). Therefore, many photographers take photos directly with the iPhone when it is inconvenient to take the camera.