掌上万年历 is a utility application designed for iPhone users, offering a wide range of features rooted in Chinese culture. It provides users with access to a perpetual calendar, daily auspicious and inauspicious activities, holiday adjustments, and seasonal information. The app allows for easy conversion between the Gregorian and lunar calendars, making it a versatile tool for time management.

Among its notable features are detailed information on traditional holidays, clear displays of statutory holiday adjustments, and professional Huang Li (Chinese almanac) data. Users can also find auspicious days for various activities such as weddings, business openings, and moving, alongside customizable reminders for important dates and events. Additionally, the app includes practical widgets for quick access to calendar information without launching the application.