For services that work across multiple platforms it’s important to keep a consistent style across UI elements. Various platforms and operating systems have their own native UI elements, but you can still add brand characteristics. At the end of each project I put together a grid of all the UI elements, as a quick reference for any future project. There is also a master UI matrix comparing elements across platforms, i.e. how does a play icon look on iOS compared to Android, and can it still reflect the brand?
iOS GUI schema
Desktop version schema
