Rounded icon even iconic design element of iOS, became a apple style. Actually in real life, rounded corners design is very common, such as tables, boot, lunch boxes, etc. As long as is the rectangular items, will be designed into rounded rectangle, otherwise, sharp Angle may cause damage to the user. Life users to contact more rounded rectangle, rounded rectangle pass the harmless and familiar with the hint. And right Angle rectangular items for contact with very few, will let users from strangeness and not realistic. Designed to icon, the user's attention have a part in the shape of the scattered icon, influence the effect of information transmission icon.
