# Protractor vs 金属表面缺陷检测

The clearest difference is price: Protractor at Free against 金属表面缺陷检测's $89.99. Protractor also leads on device support. 金属表面缺陷检测's advantage is iOS requirement (15.0 vs 17.0). On in-app purchases there is nothing between them.

Protractor is free to download; 金属表面缺陷检测 costs $89.99 up front. Protractor sells 6 in-app purchases, starting at $4.99 per month and 金属表面缺陷检测 sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Protractor | 金属表面缺陷检测 |
| --- | --- | --- |
| Price | **Free** | $89.99 |
| Rating | **[1.8 (6 ratings)](https://appshunter.io/ios/app/protractor-measure-angles/id1601838509/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 63.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | — |
| Update frequency | Every 5 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 16 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | **iPhone, iPad** | — |
| Age rating | 4+ | 4+ |
| Developer | [Noadit, Inc.](https://appshunter.io/developer/1516754355) | [亮 陈](https://appshunter.io/developer/1879274665) |

## What reviewers say

### Protractor

[App page](https://appshunter.io/ios/app/protractor-measure-angles/id1601838509)

Measure angles precisely using your phone's screen, gyroscope, or camera. Offers smart presets, real-time feedback with high accuracy, and calibration features to adapt to various situations.

**Highlights:** 3-in-1 measurement modes, Smart angle presets with alerts, Hyper-responsive feedback (≤0.5° accuracy), Auto dynamic compensation calibration, Anti-shake technology for motion scenes, Screen lock for measurements

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP | $4.99 | per month |
| Bubble Tea | $0.99 | one-time |
| Sponsor | $4.99 | one-time |
| Coffee | $4.99 | one-time |
| Sponsor | $19.99 | one-time |
| Sponsor | $99.99 | one-time |


### 金属表面缺陷检测

[App page](https://appshunter.io/ios/app/id6760247407)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度订阅 | $3.99 | per month |
| 年度订阅 | $12.99 | per year |


## Frequently asked questions

### Is Protractor free?

Protractor is free to download, with in-app purchases available.

### Is 金属表面缺陷检测 free?

金属表面缺陷检测 costs $89.99, and also offers in-app purchases.

---

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