2048

Develop a cross-platform mobile application that enables users to efficiently organize daily to-do items, set custom reminder schedules, and mark task completion status with a single tap. The core functionality should include three main modules: first, a task creation module that supports adding task titles, detailed descriptions, priority tags (high, medium, low), and optional due date and time settings, with a one-click save function to reduce user operation steps. Second, a task list display module that can automatically sort tasks by priority and due date, and support filtering by completion status and priority to help users quickly locate target tasks. Third, a reminder module that can pop up notification prompts on the user's mobile phone at the preset time, and support the option of delaying reminders for 5, 10 or 15 minutes according to user needs. The app interface should adopt a concise and clear design style, use soft and eye-friendly color matching, avoid redundant decorative elements, and ensure that the operation process is smooth without lag. It also needs to support one-click export of task records of the current month in CSV format for users to back up and view their historical task data, while ensuring that all user task information is stored locally by default to protect user privacy and data security, and does not require users to register an account to use all basic functions, lowering the usage threshold for new users.