Lịch Âm Dương is a free calendar app developed by BlueChipLTA for Android users. This app is designed to provide users with an easy way to view the lunar and solar calendar, check for good or bad hours, and view daily horoscopes. Additionally, users can create reminders for important dates such as anniversaries and birthdays.

One of the best features of Lịch Âm Dương is its quick-view widget that allows users to check the calendar without opening the app. The app also has a simple and user-friendly interface that makes it easy to navigate and use.