# Protractor vs Trailer Check Pro

The clearest difference is in-app purchases: Trailer Check Pro at none against Protractor's 6. Trailer Check Pro also leads on iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Protractor sells 6 in-app purchases, starting at $4.99 per month. Trailer Check Pro asks for nothing beyond the download.

## The numbers

| Metric | Protractor | Trailer Check Pro |
| --- | --- | --- |
| Price | Free | Free |
| 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 | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 32 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Noadit, Inc.](https://appshunter.io/developer/1516754355) | [Greg Maendel](https://appshunter.io/developer/507756979) |

## 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 |


### Trailer Check Pro

[App page](https://appshunter.io/ios/app/trailer-check-pro/id6802115936)

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

**In-app purchases:** none


## Frequently asked questions

### Is Protractor free?

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

### Is Trailer Check Pro free?

Trailer Check Pro is free to download, with no in-app purchases.

### Do Protractor or Trailer Check Pro have ads?

Neither Protractor nor Trailer Check Pro shows ads.

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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.*