HTC One camera brings continuous shot that help you to take a set of images. You can then choose the best one among it. It is very simple and allows you to choose the best photos among different shots.
Step 1 : Launch the Camera App.
Step 2 : Hold the Camera button on the right menu for some seconds. The camera will keep on taking pictures if you hold the button and will stop as you release it.
Step 3 : The next screen you will get is a set of different photos among which you have to choose the best one and save it.