Ive been using marvel to prototype an apple watch app on my apple watch. From my understanding its the only prototyping machine that will actually allow me to prototype directly on the watch so kudos to that. However it is only clickable and it really would be ideal if swipes can be added like in the Pop app. The software has also been buggy and slow. I know its early with the apple watch but hopefully these features expand. For the time being it gets the job done but in a rough way.