Free Download for Android Softonic review 魯班尺 - A Handy Feng Shui Tool 魯班尺, also known as "Luban ruler" or "Lu-like feet," is a popular feng shui tool commonly referred to as a "text-meter." This app, developed by InGee Information Co. Ltd, is available for Android and is free to use. It falls under the category of Utilities & Tools.