They use Swift Playgrounds to do a lot of development: "Swift Playgrounds for iterative development and styling. Most major screens in the app get a correspond

They use Swift Playgrounds to do a lot of development: "Swift Playgrounds for iterative development and styling. Most major screens in the app get a corresponding playground where we can see a wide variety of devices, languages, and data in real time." https://github.com/kickstarter/ios-oss/tree/master/Kickstarter-iOS.playground/Pages https://github.com/kickstarter/ios-oss/tree/master/Kickstart... I've recently bought into this development method too. It's not quite what Bret Victor dreamed up, but it's a big step in the right direction.