I have been working on Sphere application for the last 8 months. The app has been live almost 3 months and was featured by Apple several times. We've got a great design and and its implementation. I would like to share with you a few ideas that we were able to test. We built a cool sign up screen which now gives us 84% conversion rate. We used metaforms of access cards that can be used for authentication. And here what we've got. Full video https://vimeo.com/74602184