Lu Ban Ruler is an Android application developed by Wedo.jsc that helps users determine the size of objects according to Feng Shui principles. The app is named after the first person to study and develop the Lu Ban feet ruler.

The app offers three ruler sizes - 52cm, 42.9cm, and 39cm - each with various supply divisions, including positive and negative supplies denoted by red and black symbols, respectively. These rulers are used for different purposes such as architecture, construction, furniture production, and grave-related work.

Wedo Architecture & Construction is a leading company in architectural design and construction in Vietnam, and they are the first to promote the use of size according to Feng Shui principles. After many years of use and research, Wedo developed the Lu Ban Ruler app to help people quickly and easily find good-sized Feng Shui objects in their daily lives.

Lu Ban Ruler is a handy tool for Feng Shui enthusiasts and professionals alike, offering a simple and efficient way to determine the size of objects.