To create a useful mobile app, it's essential to gather both quantitative and qualitative data from users. Quantitative data is numerical and easy to record, categorize, and represent visually, but it can be prone to misinterpretation without context. On the other hand, qualitative feedback is descriptive, subjective, and emotionally-driven, providing valuable insights into user motivations and perceptions. By combining both types of data, developers can make informed decisions about their product's development and improve user experience. Qualitative research methods include in-app feedback tools like Instabug, external methods such as focus groups, case studies, expert opinions, emails, and observational research, which help reach the hearts and minds of users and provide valuable insights into their needs and preferences.