# 专业指南针 vs AR Measuring Tool

The clearest difference is review sentiment: AR Measuring Tool at 57% against 专业指南针's 14%. 专业指南针's advantage is update cadence (every 4 days vs fortnightly). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. 专业指南针 sells 4 in-app purchases, starting at $6.99 per 7 days and AR Measuring Tool sells 5 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

专业指南针 ships an update every 4 days, AR Measuring Tool fortnightly. The most recent releases landed on October 16, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | 专业指南针 | AR Measuring Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/gps/id6752315093/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 14.3% of reviews | **57.1% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Fortnightly |
| Monetization | Freemium | Free with in-app purchases |
| Size | 43 MB | 51 MB |
| Requires iOS | 15 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hutui tech](https://appshunter.io/developer/1814030829) | [Chengdu Yichituo Technology Co., Ltd.](https://appshunter.io/developer/1846312239) |

## What reviewers say

### 专业指南针

[App page](https://appshunter.io/ios/app/gps/id6752315093)

This app offers precise directional guidance and location services, featuring a high-accuracy compass, altitude, and coordinate display. It also includes a smart level tool, real-time weather updates, and a camera that adds location-based watermarks to photos.

**Highlights:** High-accuracy electronic compass, Altitude and coordinate display, Smart level tool, Real-time weather information, Watermark camera with location data, Outdoor navigation and life assistant

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 立即使用专业指南针 | $6.99 | per 7 days |
| 立即使用 | $6.99 | per 7 days |
| 立即使用 | $6.99 | per 7 days |
| 立即使用专业指南针 | $29.99 | per year |


### AR Measuring Tool

[App page](https://appshunter.io/ios/app/ar-measuring-tool/id6761401260)

This app uses augmented reality to transform your device into a versatile measuring tool. It offers precise measurements for length, area, and height, along with a protractor, level, and object recognition capabilities. It's designed for various applications from home DIY to professional use.

**Highlights:** Precise AR measurements (length, area, height), Mobile protractor for angle detection, High-precision level calibration, Automatic photo counting for stacked items, Real-time object recognition and information, Simple and intuitive interface

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 立即使用测量 | $6.99 | per 7 days |
| 免费试用 | $6.99 | per 7 days |
| 首周优惠 | $6.99 | per 7 days |
| 免费试用3天 | $9.99 | per 7 days |
| 立即测量 | $29.99 | per year |


## Frequently asked questions

### Is 专业指南针 free?

专业指南针 is free to download, with in-app purchases available.

### Is AR Measuring Tool free?

AR Measuring Tool is free to download, with in-app purchases available.

### Do 专业指南针 or AR Measuring Tool have ads?

Neither 专业指南针 nor AR Measuring Tool shows ads.

### Which is updated more often, 专业指南针 or AR Measuring Tool?

专业指南针 ships an update every 4 days, and AR Measuring Tool fortnightly. Most recently, 专业指南针 was updated on October 16, 2026 and AR Measuring Tool on October 8, 2026.

---

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