Comparison

The Royal Card vs Online Lu Ban Ruler

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

The Royal Card

Features
Read full description

As a member of The Royal Card, this application provides you detailed information about Le Royal Amman, and the exclusive discounts and benefits you can enjoy during your visits to Le Royal Amman. You also have the opportunity to take advantage of valuable ongoing monthly promotions at Le Royal Amman. This application allows you to: • Login as a member to enjoy your benefits, once you signup • Use your eCard discounts and other benefits • View vital information – facilities, restaurants, contact information • View promotional offers

About

Online Lu Ban Ruler

This app provides a digital Lu Ban ruler for measuring dimensions in construction, graves, and furniture. It offers extended length options up to 16 meters and allows users to select auspicious measurements based on traditional Feng Shui principles.

Highlights
  • Digital Lu Ban ruler for Feng Shui measurements
  • Extended length up to 16 meters
  • Supports 52.2cm, 42.9cm, and 38.8cm ruler types
  • View meanings of good and bad ranges
  • Enter specific dimensions in mm
  • Save project dimensions
  • Reference for common golden dimensions
Features
Read full description

1. Why have the Feng Shui Ruler Online Application? Currently, many types of pre-made Lu Ban rulers are on the market with a maximum length of only 5 meters. The disadvantage is that users cannot determine the size, as well as the good and bad measuring when the length exceeds 5 meters. Grasping this practical need, our Online Lu Ban Ruler application was born, and is available on multiple platforms, with the maximum length of the Lu Ban ruler up to 16 meters, we hope to help everyone easily pull the Lu Ban ruler anytime, anywhere, whenever, and choose the right golden size as desired. Based on the lookup measuring, people can use them to determine good and bad measures, to use for houses (doors, windows, height floors...), to use for graves (altars, tombs...), to use for furniture (tables, chairs, wardrobes,...). 2. Learn more about the Lu Ban Rulers. a. What is a Lu Ban ruler? A Lu Ban ruler is a type of measuring instrument used to measure dimensions in construction. The name of the Lu Ban ruler is named after the person who invented it - Lu Ban. This type of Lu Ban ruler is used in the construction of Duong Trach (houses) and Am Trach (graves). On this type of ruler, there are normal size divisions, corresponding to good and bad arcs. Correspondence in the Lu Ban ruler helps people know which sizes to use and which sizes to avoid. - Graves (Am Trach) - Houses (Duong Trach) b. Classification of Lu Ban rulers Currently, there are many different types of Lu Ban rulers on the market, but in terms of popularity, the 52.2 cm Lu Ban ruler, passed down through generations, and the retractable ruler with dimensions of 42.9 cm at the top and 38.8 cm at the bottom are the most common. Of course, depending on the type of ruler and the item being measured, such as doors, altars, etc., there will be different methods to calculate and determine the "golden measurements.". 3. Main features of the Online Lu Ban ruler application. - Pull the Lu Ban ruler to select the golden dimensions according to each type of Lu Ban ruler: 52.2 cm, 42.9 cm, 38.8 cm. - The maximum length that the ruler can be extended is up to 16 meters. - You can enter specific dimensions in mm to quickly select the desired size. - View the meaning of the good and bad ranges on each type of Lu Ban ruler. - Refer to the available golden dimensions, used as the clear height of each floor. Used for windows, and doors. Used for the height, length, and width of the altar. Used for the height and depth of the kitchen... - Project function: Helps users save the dimensions they choose to use for personal and company projects. 4. Payments - Subscriptions - The Terms of Use (EULA) are available at: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ - The Privacy Policy is available in the Privacy Policy field in App Store Connect at: https://developer.apple.com/help/app-store-connect/manage-app-information/manage-app-privacy/ 5. Disclaimer. This application was created by individual Ngô Quang Cường and is owned by GiaPhuGroup.com®. This application was designed to help users extend the online Lu Ban ruler up to 15 meters, view the good and bad ranges, and select the desired golden dimensions. All size parameters showing good and bad ranges on this online Lu Ban ruler application are for reference purposes only. The choice of which dimensions to use for any purpose is entirely up to you. We are not responsible for any reason. - Terms and conditions: https://www.thuoclobanonline.com/en/menu/online-lu-ban-ruler-terms-and-conditions/ - Privacy Policy: https://www.thuoclobanonline.com/en/menu/online-lu-ban-ruler-privacy-policy/ For any inquiries or feedback, please send them to the email address: sales@giaphugroup.com. We will respond to you within 24 working hours.

Screenshots

The Royal Card4 screens
Online Lu Ban Ruler4 screens

Verdict

The call

The clearest difference is in-app purchases: The Royal Card at none against Online Lu Ban Ruler's 3. Online Lu Ban Ruler's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Online Lu Ban Ruler sells 3 in-app purchases, starting at $0.39 per month. The Royal Card asks for nothing beyond the download.

UpkeepUpdate frequency

The Royal Card ships an update every 3 months, Online Lu Ban Ruler every 3 weeks. The most recent releases landed on October 27, 2026 and November 4, 2026 respectively.

Scorecard2 real differences · 6 level
The Royal Card versus Online Lu Ban Ruler: the parameters behind the verdict, then further details
ParameterThe Royal CardOnline Lu Ban Ruler
PriceFreeFree
Positive reviews—0.0% of reviews
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.0 — better13.0
Further details — not scored
Size40 MB18 MB
Age rating4+17+
DeveloperHospitality Marketing Concepts, LLC.Cuong Ngo Quang

In-app purchases

None

The Royal Card

No in-app purchases

3 purchases

Online Lu Ban Ruler

Subscriptions3
  • Removing ads 1 month$0.391 Month
  • Loại Bỏ Quảng Cáo 6 Tháng$1.596 Months
  • Loại Bỏ Quảng Cáo 12 Tháng$2.391 Year

Questions

Is The Royal Card free?
The Royal Card is free to download, with no in-app purchases.
Is Online Lu Ban Ruler free?
Online Lu Ban Ruler is free to download, with in-app purchases available.
Do The Royal Card or Online Lu Ban Ruler have ads?
Neither The Royal Card nor Online Lu Ban Ruler shows ads.
Which is updated more often, The Royal Card or Online Lu Ban Ruler?
The Royal Card ships an update every 3 months, and Online Lu Ban Ruler every 3 weeks. Most recently, The Royal Card was updated on October 27, 2026 and Online Lu Ban Ruler on November 4, 2026.

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