# Lu Ban Ruler - Feng Shui — Feng Shui Measuring Tool

> Feng Shui measuring tool for furniture, houses, and graves based on Lu Ban principles. (iPhone/iPad app by Manh Nguyen.)

- Source: https://appshunter.io/ios/app/lu-ban-ruler-feng-shui/id6443977526 (this page in markdown: same URL + `.md`)
- Developer: [Manh Nguyen](https://appshunter.io/developer/1445497751)
- Category: Developer Tools, Lifestyle
- Price: Free
- Rating: 4.40/5 from 7 App Store ratings
- Age rating: 4+
- Requires: iOS 13.0 · 2 MB
- Languages: American English, Chinese (Simplified, China), Vietnamese
- Released: 2024-10-28
- Data updated: 2026-09-12
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/lu-ban-ruler-feng-shui/id6443977526/reviews.md

## What is Lu Ban Ruler?

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!

## Key features

- Door Ruler for furniture
- Yang House Ruler for buildings
- Yin House Ruler for graves
- High accuracy
- Offline functionality
- Multiple unit support (cm, mm, meters)
- Detailed usage guide


## Frequently asked questions about Lu Ban Ruler

### What types of measurements can Lu Ban Ruler be used for?

Lu Ban Ruler offers three specialized rulers: the Door Ruler for furniture, the Yang House Ruler for buildings, and the Yin House Ruler for graves and funeral arrangements.

### Does Lu Ban Ruler require an internet connection to function?

No, Lu Ban Ruler is designed to work completely offline, meaning you do not need an internet connection to use its measuring features.

### What units of measurement does Lu Ban Ruler support?

The app supports multiple units of measurement, including centimeters (cm), millimeters (mm), and meters, providing flexibility for various measurement needs.

### Is Lu Ban Ruler free to use?

Yes, Lu Ban Ruler is completely free to download and use. It does not have any associated costs or in-app purchases.

### Does Lu Ban Ruler contain advertisements?

No, Lu Ban Ruler is ad-free. Users can utilize all its features without encountering any advertisements.

### What is the accuracy of the measurements provided by Lu Ban Ruler?

The app is designed for high accuracy, applying the ancient principles of Master Lu Ban to ensure precise measurements for Feng Shui applications.

### What devices is Lu Ban Ruler compatible with?

Lu Ban Ruler is compatible with iPhones, iPads, and iPods, making it accessible to a wide range of Apple device users.

### How often is Lu Ban Ruler updated?

The latest version of Lu Ban Ruler is 1.4, and it was last updated on January 20, 2026. This indicates a commitment to ongoing development and improvements.

## Version history (last 5 releases)

### 1.5 — 2026-07-04

This update makes measuring with the Luban ruler faster and more accurate:

• Auspicious size suggestions: when a measurement lands on an inauspicious segment, the app instantly tells you how many mm to add or subtract to reach the nearest auspicious one.
• Edge-to-edge ruler with a wider, clearer layout and larger result text.
• Haptic alert when a measurement crosses into an inauspicious zone — no need to look at the screen.
• New quick-adjust buttons (−1mm / +1mm) and a reset-to-zero button.
• Easier number entry (comma support and number pad).
• Sharper dark mode and a layout optimized for iPad.
• Reviewed and refined the feng shui terminology across all three languages.
• Brand-new app icon.
• Various bug fixes and stability improvements.

Thank you for using Luban Ruler!

### 1.4 — 2026-01-20

- Brand new interface design
- Added Chinese language support
- Added haptic feedback
- Improved algorithm and app performance

### 1.3 — 2025-05-05

- Update dark/ light screen.
- Support English and Vietnam language.

### 1.2 — 2024-11-13

- Cập nhật lại giao diện

### 1.1 — 2024-10-31

- Cập nhật mầu thước
- Cập nhật lại layout cho cân đối

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## More apps by Manh Nguyen

- [Ngũ Linh Thần Toán](https://appshunter.io/ios/app/ngu-linh-than-toan/id6443764475)
- [Luopan: Feng Shui Compass](https://appshunter.io/ios/app/luopan-feng-shui-compass/id6736584559)
- [Lich Van Nien - Lunar Calendar](https://appshunter.io/ios/app/lich-van-nien-lunar-calendar/id6747055124)
- [Fomodo: Focus Timer & Study](https://appshunter.io/ios/app/fomodo-focus-timer-and-study/id6754500841)

All apps by Manh Nguyen: https://appshunter.io/developer/1445497751

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-12.*