How do you design the UI for a new app or feature? Good old fashioned pencil and paper? Photoshop or Sketch? Perhaps a wireframing tool like Balsamiq? Maybe you build clickable mockups or fully interactive prototypes? However you go about it, getting some feedback on a design before it’s fully coded is great way to save time and effort. When building apps for clients they’re usually a lot happier if they can see and touch what they’ll be getting before it’s built.