# SamtechApp vs Online Lu Ban Ruler

The clearest difference is in-app purchases: SamtechApp at none against Online Lu Ban Ruler's 3. SamtechApp also leads on iOS requirement (5.1.1 vs 13.0). Online Lu Ban Ruler's advantage is update cadence (every 3 weeks vs every 4 months). On price, ads and device support there is nothing between them.

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

SamtechApp ships an update every 4 months, Online Lu Ban Ruler every 3 weeks. The most recent releases landed on October 3, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | SamtechApp | Online Lu Ban Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 27 MB | 18 MB |
| Requires iOS | **5.1.1** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [南松 张](https://appshunter.io/developer/990173939) | [Cuong Ngo Quang](https://appshunter.io/developer/1736908974) |

## What reviewers say

### SamtechApp

[App page](https://appshunter.io/ios/app/samtechapp/id990972091)

**In-app purchases:** none


### Online Lu Ban Ruler

[App page](https://appshunter.io/ios/app/online-lu-ban-ruler/id6499095825)

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:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Removing ads 1 month | $0.39 | per month |
| Loại Bỏ Quảng Cáo 6 Tháng | $1.59 | per 6 months |
| Loại Bỏ Quảng Cáo 12 Tháng | $2.39 | per year |


## Frequently asked questions

### Is SamtechApp free?

SamtechApp 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 SamtechApp or Online Lu Ban Ruler have ads?

Neither SamtechApp nor Online Lu Ban Ruler shows ads.

### Which is updated more often, SamtechApp or Online Lu Ban Ruler?

SamtechApp ships an update every 4 months, and Online Lu Ban Ruler every 3 weeks. Most recently, SamtechApp was updated on October 3, 2026 and Online Lu Ban Ruler on October 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*