Micro apps are smaller than apps and are ephemeral because they are used in an instant and designed to disappear from the user's perception once completing their tasks. Because of the Glass wearable form factor, micro apps deviate from the LCD square and touchscreen/keyboard design of smartphone, tablet, and PC apps, and are intended to be hands-free and responsive in the moment. Well-designed Glass apps employ its UI to let the user do something that they could not otherwise do with another device. Glass’s notifications are a good example of this. The best consumer-facing Google Glass experiences highlight how apps can leverage this micro app programmable wearable form factor.