Lantern Margins is a journaling app designed for users to record their observations from various settings, such as walks, commutes, and window seats. Users can create entries and describe their experiences in detail. Each entry can be tagged by mood, location, and light conditions to help organize the content. The app allows users to add specific notes to each entry for more context. Users can browse their entries at any time and filter them based on tags. The app features a simple interface for easy navigation and entry management. There are options for customizing the visual appearance of the entries. Users can review their past observations and reflect on their experiences.