Thời Khóa Biểu - Vịt Đếm Ngược is a free iPhone app developed by Dat Hoang. It falls under the lifestyle category and aims to assist users in managing their study schedules, tasks, work calendars, and assignments.

The app offers several key features, including the ability to display and customize timetables. Users can easily view their schedules on the home screen, allowing for quick and convenient access. Additionally, the app provides the option to share timetables with others in the class by generating a QR code. This feature is particularly useful for one person updating the timetable and sharing it with the entire class.

Thời Khóa Biểu - Vịt Đếm Ngược also includes notification and reminder features to help users stay on top of their events and academic commitments. The app is ad-free, ensuring a seamless user experience.

Overall, Thời Khóa Biểu - Vịt Đếm Ngược is a valuable tool for students and professionals who want to effectively manage their schedules and tasks.