iPhone Shutter

The obvious way to snap the shutter on the iPhone's camera app is the on-screen touch button.  If you, like me, would prefer to keep both hands on the iPhone to keep it steady, you can also trigger the shutter with either the volume up or volume down button.  Then there are three other "weird" ways as detailed on the article at this link.

http://iphonephotographyschool.com/shutter/