万年历-日历农历天气查询工具 is a free calendar and schedule management application for iPhone, iPod, and iPad. It offers a range of practical features, including calendar and weather queries, conversion between the Gregorian and lunar calendars, event reminders, and holiday notifications.

With this app, you can easily manage your calendar, plan your time, record tasks, capture inspirations, and summarize your progress. It also allows you to record birthdays, anniversaries, holidays, and reminds you to care for your family, provides historical information, and sends notifications for scheduled events and health reminders.

Key features include:

• Today's schedule and to-do list: Plan your day and stay organized.
• Task management: Easily jot down your thoughts and set reminders.
• All-round reminders: Set alarms for daily, weekly, monthly, yearly, or custom intervals.

Please note that the app offers a subscription service called "万年历会员连续包月" which costs 6 yuan per month. The subscription can be managed and canceled through the iTunes Store settings.

Overall, 万年历-日历农历天气查询工具 is a comprehensive and free calendar and schedule management tool with useful features to help you stay organized and efficient.