- I am a new member of Pinterest.com. I noticed that they only had a smartphone app for iPhone and not for WP7 or Android OS. I decided to do a quick design concept of what I think it should look like. I am somewhat biased as I am a WP7 user so that's the design I chose. I am sure they are working on a app for both platforms as I speak but I wanted to stretch my design legs so-to speak. I do not work for Pinterest, this is merely a design exercise.