An example wearable electronic device may include a main body including a first surface having an opening area formed therein, wherein a plurality of lateral walls, surrounding at least one part of the opening area, are formed in the peripheral area of the opening area; a display disposed inside the main body and which is viewable through the opening area; a wheel including a mounted part, which is at least partially mounted on the peripheral area, and an extension part which extends in the inward direction from the mounted part, wherein the wheel is formed in a ring shape extending in the circumferential direction with respect to a rotation axis of the wheel; and a guide member partially coming into contact with the main body and the wheel, respectively, and for guiding the rotation of the wheel. The guide member may include a first part having at least one portion thereof extending to a space between the plurality of lateral walls and a second part at least partially inserted to a first recess formed in each of the plurality of lateral walls.

A computing device includes a display device, one or more sensors to obtain biometric information of a user associated with the computing device, and one or more processors to execute instructions stored in one or more memories to: determine whether the user completes one or more biometric goals based on the biometric information, and receive data associated with a first user interface screen and data associated with one or more first biometric achievement user interface screens. Each of the first biometric achievement user interface screens include one or more first user interface elements from the first user interface screen and are associated with biometric goals. The first user interface screen forms at least part of a home screen, and in response to the user completing a first biometric goal, a corresponding first biometric achievement user interface screen associated with completion of the first biometric goal is provided.

An apparatus, intended for use in indicating time interval durations of particular events in an augmented reality display, includes a computer system with a processing system having a hardware processor and a memory accessible to the processing system, a user interface controller under control of the processing system, a display controllable by the user interface controller to show a user interface, and logic, under control of the processing system. The logic has modules that control the user interface controller to cause the display to show a first clockface that indicates a time interval duration for at least a first event and an augmented reality background appearing behind the first clockface.

A system and method/apparatus is provided which includes a fluid mix that when mixed together, creates a blend that matches a refractive index of a transparent material with which the fluid is in contact such as borofloat 33, borosilicate, float glass or fused silica, or transparent polymers, arid to have a kinematic viscosity in a certain range.