Lu Ban Ruler - Feng Shui

LUBAN RULER – The feng shui ruler in your pocket

The Luban ruler is essential when building doors, gates, altars, beds, cabinets or stairs. This app instantly tells you whether a measurement falls on a LUCKY or UNLUCKY segment, and suggests the nearest auspicious size — anytime, anywhere.

ALL THREE RULERS INCLUDED

• Clear Opening (52.2cm) – for the clear opening of doors and gates

• Yang Dwelling (42.9cm) – for stoves, beds, tables and furniture

• Yin Dwelling / Ding Lan (38.8cm) – for altars, shrines and graves

KEY FEATURES

• See the result of all three rulers at once

• Drag the ruler or type a measurement directly (mm/inch)

• Auspicious size suggestions: on an unlucky mark, the app tells you exactly how many mm to add or subtract to reach the nearest lucky one

• Haptic alert when a measurement crosses into an unlucky zone – measure without looking

• Quick-adjust buttons (−1mm / +1mm) and reset-to-zero

• Plain-language meaning for every segment

• Three languages: Vietnamese, English, Chinese

• Light & Dark mode

• Optimized for both iPhone and iPad

WHO IS IT FOR?

• Carpenters, builders and contractors

• Homeowners renovating, building or setting up an altar

• Anyone interested in feng shui

Works fully offline. No account required.

Download now so every dimension in your home is in harmony!