Crust Lantern is a mobile app designed for home bakers who want to track their sourdough fermentation processes. Users can log and monitor the feeding schedules of their sourdough starters. The app allows for the documentation of levain builds, including the ratios of ingredients used. Users can input and track dough temperatures for better baking results. The app provides a space to record and evaluate loaf outcomes, helping bakers refine their techniques. It supports the management of multiple jars of sourdough starter. Users can create notes and observations for each fermentation cycle. The interface is designed to help bakers keep all relevant information organized in one place.