Elasticode was a platform designed for mobile developers to create personalized in-app experiences without writing additional code. It allowed for real-time changes in mobile applications to enhance user engagement by enabling features such as dynamic UI updates, A/B testing, and personalized user onboarding. Users could implement these features via a visual editor, which streamlined the process of altering app components based on user behavior and data analytics. However, it's important to note that Elasticode is no longer operational, as the service has been discontinued.