# AR鲁班尺 vs 酷开灵耳

The clearest difference is price: 酷开灵耳 at Free against AR鲁班尺's $0.29. 酷开灵耳 also leads on in-app purchases (none vs 7) and update cadence (every 6 weeks vs every 4 months). AR鲁班尺's advantage is review sentiment (94% vs 50%) and device support (3 vs 1). On ads there is nothing between them.

酷开灵耳 is free to download; AR鲁班尺 costs $0.29 up front. AR鲁班尺 sells 7 in-app purchases, starting at $4.99 per month. 酷开灵耳 asks for nothing beyond the download.

AR鲁班尺 ships an update every 4 months, 酷开灵耳 every 6 weeks. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | AR鲁班尺 | 酷开灵耳 |
| --- | --- | --- |
| Price | $0.29 | **Free** |
| Rating | **[4.9 (82 ratings)](https://appshunter.io/ios/app/ar/id1384164285/reviews)** | — |
| Number of ratings | **82** | — |
| Positive reviews | **93.6% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Monetization | Subscription | — |
| Size | 105 MB | 155 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [桐明 陈](https://appshunter.io/developer/1197339496) | [深圳市酷开网络科技有限公司](https://appshunter.io/developer/1106392156) |

## What reviewers say

### AR鲁班尺

[App page](https://appshunter.io/ios/app/ar/id1384164285)

This app transforms your phone into a digital measuring tool, ideal for home buying, renting, and renovation. It offers customizable ruler lengths, unit conversions, and the ability to view CAD files and create floor plans. It also includes a feature to measure land area on a map.

**Highlights:** AR measurement with auspicious meanings, Customizable and preset ruler lengths, Multiple measurement units, View and analyze CAD files, Create floor plans, Map-based land area measurement

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月VIP会员 | $4.99 | per month |
| 年VIP会员 | $12.99 | per year |
| 移除广告 | $3.99 | one-time |
| 最长测量长度为2千米 | $4.99 | one-time |
| 46.08厘米尺长 | $4.99 | one-time |
| 50.4厘米尺长 | $4.99 | one-time |
| 解锁所有功能 | $19.99 | one-time |


### 酷开灵耳

[App page](https://appshunter.io/ios/app/id6755461346)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is AR鲁班尺 free?

AR鲁班尺 costs $0.29, and also offers in-app purchases.

### Is 酷开灵耳 free?

酷开灵耳 is free to download, with no in-app purchases.

### Do AR鲁班尺 or 酷开灵耳 have ads?

Neither AR鲁班尺 nor 酷开灵耳 shows ads.

### Which is updated more often, AR鲁班尺 or 酷开灵耳?

AR鲁班尺 ships an update every 4 months, and 酷开灵耳 every 6 weeks. Most recently, AR鲁班尺 was updated on October 29, 2026 and 酷开灵耳 on October 28, 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.*