소소해피 is a lifestyle application designed for iPhone users, focusing on capturing and celebrating small moments of happiness in daily life. The app features a unique calendar where users can document their "소확행," or small but certain happiness, using adorable characters. It allows for categorization and easy access to recorded joyful moments, enhancing the experience of recognizing everyday bliss.

In addition to the calendar, 소소해피 offers a happiness journal where users can log their daily weather, happiness index, and categories that bring them joy. Users can share their entries with others or keep them private with a lock feature. The app also provides statistics to track happiness trends over time and a feed to view and support friends' entries, fostering a community around shared happiness experiences.