I had a recent, painful experience app developers know well: developing an app for both iOS and Android. Porting from one platform to the other can be time-consuming and frustrating. In addition, older Apple iPhones (older than 5), incompatible with iOS 11, can’t do AR, and at the moment neither can most Andriod phones. As a result, publishers reach only a fraction of the 3+ billion addressable smartphones in the world. 8th Wall, a recently funded startup led by Google and Facebook veteran Erik Murphy-Chutorian, is going to change that, and might well become a unicorn in the process.