The approach to designing apps for Android wearable devices, especially custom watch faces, needs to be substantially different from how you go about designing apps for phones or tablets, as these contain a different user experience. It is important to keep in mind and follow the Android UI design principles documentation that Google has provided.

This document describes the guidelines and principles that help you to design consistent user interfaces and experiences for your Android wearable apps, ensure that your application runs efficiently on the Android Wear platform, and it also involves considering the screen sizes of your custom layouts, memory limitations, and the ease of use of your app.

Other areas covered by the document are guidelines to ensure the consistency of your application as you navigate from screen to screen, as well as principles to design good user interfaces. This document also includes the following design guidelines that...