Bookmarking User Data


We have built a Knack app that to allow users to view and learn about the thousands of English-taught, college and master's degree programs in continental Europe. Each user gets read access and has the ability to save their Favorites to a list. The Favorites functionality is written in JavaScript as custom code and runs as an object-based request. Is there anything within Knack that could be used to replace this, so I don't have to run the custom code? 

This work ?