Normal Ears made custom-fitted 3D printed earphones that sold for $199. Previously, the way to make such earbuds was to go to an audiologist, get a silicone mold made of your ear, and have an expensive fitted piece cast from the mold. Instead, Normal used its iOS and Android apps to guide the user through taking multiple photos of their ears from many different angles, which were then used to generate a 3D model and quickly 3D print the custom pieces in about 48 hours. I built the backend API that the apps used to communicate with nrml.com, as well as all of the internal tools used by the factory team to track orders as they were assembled. I also did work on the iOS and Android apps.