UX Design for Mobile

Portrait (vertical) and landscape (horizontal) orientations

Modern smartphones can use the accelerometer to detect the orientation of our devices. Most users use their mobile in portrait position. Generally, this approach allows use of the mobile with one hand, so it is not surprising that it is the most popular.

However, some applications may take advantage of the use of the landscape position. Applications such as games, which seek greater maneuverability, allow the user to make use of both their hands in a horizontal position:

Twitter app on landscape position with bigger keyboard and less typing area (left) and on portrait position with ...