Lume Diary is a free Android application designed to help users track and manage their daily emotions. With a user-friendly interface, the app allows individuals to log their feelings using nine distinct emotion icons, including happy, calm, and angry. Users can create new journal entries by tapping on an empty day or the dedicated add button, making it easy to document their emotional state at any time. The app also features a mood history calendar that enables monthly navigation through swiping gestures, allowing users to reflect on their emotional trends over time.

In addition to emotion tracking, Lume Diary provides users with the ability to write detailed notes and attach up to nine photos per entry, preserving special moments connected to their feelings. By tapping on any marked date, users can quickly access their journal for that specific day. The vertical swipe feature allows for seamless navigation between different days, making it a comprehensive tool for emotional reflection and personal growth.