During the recent Hack Days at Airbyte, a director of engineering developed an iOS application using the company's new Public API. The app allows users to check in on their Airbyte workspaces and manage jobs. It was built with React Native and Expo, which rendered native components for both iOS and Android platforms. The developer praised the progress made by React Native since its early days and highlighted how well it worked with Expo. However, they faced some challenges with CORS on the web but managed to work around them. The code is available for anyone interested in exploring it further.