4. Glanceable

Modern technologies have come to an age where immediate response is at the order of the day. In the Wearable context, this becomes even more important since the user's first and perhaps only contact with the SmartWatch, for instance, involves one simple glance.
Within a range of less than five seconds, one interface should be able thus to communicate effectively a notification, alert, or any other contents without confusing or disturbing the user's view.
At this point, the user becomes a sort of viewer in a peep show, where just a small sighting of a part of the full message, both representative and informative, should be enough to let him now about the whole idea. This quality makes the interface glanceable.
Fast-viewing, unsaturated, and effective glanceable interfaces should get the attention of the user and make the most of if before the screen turns off.
The less is more rule finds itself necessary,because the regular full screen versions of apps have to transform themselves into minimalistic, one or two icon, small typography interfaces, and information demands a hierarchy.