Code is the ultimate material in which your ideas will be built. Try to have basic knowledge about how developers do their work when creating and placing elements in the different views of an app. You can find some nice videos about mobile and web application software tools they will likely use to produce the application. You don't need to be able to create production-ready code; however, understanding how the developers will do their work later on will help you create a good specification document and make your work more appreciated and followed with precision.