Question Diary is an iPhone application developed by MyoungBo Seo. It falls under the lifestyle category and is available for free. The app aims to provide users with daily questions that encourage reflection and self-discovery.

Every day, Question Diary presents users with a thought-provoking question. The first question asks, "Are you happy right now?" Users have the option to answer the question or choose not to. The app follows this format, providing a new question each day for an entire year. After a year, users are shown their answers from the previous year and asked the same question again.

The application serves as a digital diary, allowing users to quickly jot down their answers. All answers are securely stored on the server, making them accessible from anywhere. Question Diary provides an opportunity for users to track their personal growth and see how their perspectives may have changed over time.

Additionally, Question Diary includes a variety of other thought-provoking questions to further explore one's thoughts and values. These questions range from pondering the meaning of life to contemplating what makes a "better life." The app aims to bring warmth and introspection to users' lives.

With Question Diary, users can engage in daily reflection, gain insights about themselves, and foster personal growth.