Kokoro Diary is a free Android application designed to enhance your journaling experience by integrating mood tracking features. It allows users to document their daily thoughts while automatically scoring their mood based on the tone of their entries. This innovative approach provides visual insights through color-coded mood calendars and trend graphs, making it easier to identify emotional patterns over time. The app also includes a stability graph to track emotional fluctuations and entry history to analyze writing habits.

In addition to its core features, Kokoro Diary offers a selection of supportive partner characters to keep users engaged. With multi-language support and secure local storage, the app ensures a personalized and safe journaling experience. Users can enjoy the app ad-free for the first 14 days and can choose to watch ads to unlock features afterward. Kokoro Diary is ideal for anyone looking to organize their thoughts, understand their emotional well-being, and cultivate a sustainable journaling habit.