Mobile applications can be effectively used in the context of UPSC preparation by providing access to study materials, quizzes, and current affairs updates. Apps like QuizUp or UPSCPathshala offer interactive learning experiences, while others like ClearIAS feature daily quizzes to boost retention. These platforms facilitate continuous learning and enable candidates to track their progress. Additionally, mobile apps can help manage study schedules and keep aspirants engaged through reminders and notifications. This flexibility supports self-paced learning, which is crucial for comprehensive preparation.