A macro is an image capture technique of objects in very close proximity, to obtain very small object details (less than 2 cm). Taking photos of macros is usually done with a camera (D) SLR, using a special lens that is usually very expensive.
With the development of cameras on mobile phones and smartphones. Try to see the results of the macro photos below, which is done using only a smartphone camera:
To be able to take photo macros with a smartphone camera, necessary conditions that must be met. Mandatory requirements that must be met is the use of additional lenses, commonly called a macro lens, specifically used for phone. This macro lens is widely available in the market. Or it could also use a camera roll lens lenses. Use of this macro lens is very easy.
For the lenses that buy on the market, there is usually a magnetic attachment. So just stick the lens behind your camera lens phone. Smartphone camera is ready to be made taking photo macros with camera phone.