# Protractor Edge vs Gran Prix Car

The clearest difference is in-app purchases: Gran Prix Car at none against Protractor Edge's 2. Gran Prix Car also leads on ads (none vs shown) and update cadence (monthly vs every 43 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Protractor Edge sells 2 in-app purchases, starting at $1.99 per year. Gran Prix Car asks for nothing beyond the download.

Protractor Edge ships an update every 43 months, Gran Prix Car monthly. The most recent releases landed on October 27, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Protractor Edge | Gran Prix Car |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (94 ratings)](https://appshunter.io/ios/app/protractor-edge-clinometer/id1198499762/reviews)** | — |
| Number of ratings | **94** | — |
| Positive reviews | 69.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 43 months | **Monthly** |
| Monetization | Freemium | — |
| Size | 21 MB | 102 MB |
| Requires iOS | 9.0 | 9.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [嵩 张](https://appshunter.io/developer/1091921941) | [文 张](https://appshunter.io/developer/1512068135) |

## What reviewers say

### Protractor Edge

[App page](https://appshunter.io/ios/app/protractor-edge-clinometer/id1198499762)

Measure angles directly on your device without taking photos or placing the angle on screen. This app offers a unique and efficient way to determine degrees, saving you time with its handy assistant functionality.

**Highlights:** Direct angle measurement on device, Intuitive line dragging interface, Measures angles in photos (Premium), Measures from camera view (Premium), Ad-free experience (Premium)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $1.99 | per year |
| Remove Ads | $0.99 | one-time |


### Gran Prix Car

[App page](https://appshunter.io/ios/app/gran-prix-car/id6769670101)

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

**In-app purchases:** none


## Frequently asked questions

### Is Protractor Edge free?

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

### Is Gran Prix Car free?

Gran Prix Car is free to download, with no in-app purchases.

### Do Protractor Edge or Gran Prix Car have ads?

Protractor Edge shows ads; Gran Prix Car does not.

### Which is updated more often, Protractor Edge or Gran Prix Car?

Protractor Edge ships an update every 43 months, and Gran Prix Car monthly. Most recently, Protractor Edge was updated on October 27, 2026 and Gran Prix Car on October 19, 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.*