# Protractor Edge vs Haldex.Flash

The clearest difference is in-app purchases: Haldex.Flash at none against Protractor Edge's 2. Haldex.Flash also leads on ads (none vs shown) and update cadence (fortnightly vs every 43 months). Protractor Edge's advantage is iOS requirement (9.0 vs 16.4). On price and device support there is nothing between them.

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

Protractor Edge ships an update every 43 months, Haldex.Flash fortnightly. Both last shipped on November 13, 2026.

## The numbers

| Metric | Protractor Edge | Haldex.Flash |
| --- | --- | --- |
| 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 | **Fortnightly** |
| Monetization | Freemium | — |
| Size | 21 MB | 33 MB |
| Requires iOS | **9.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [嵩 张](https://appshunter.io/developer/1091921941) | [Mobile Flash Solutions Ltd](https://appshunter.io/developer/1683126213) |

## 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 |


### Haldex.Flash

[App page](https://appshunter.io/ios/app/haldexflash/id6789175049)

**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 Haldex.Flash free?

Haldex.Flash is free to download, with no in-app purchases.

### Do Protractor Edge or Haldex.Flash have ads?

Protractor Edge shows ads; Haldex.Flash does not.

### Which is updated more often, Protractor Edge or Haldex.Flash?

Protractor Edge ships an update every 43 months, and Haldex.Flash fortnightly. Most recently, Protractor Edge was updated on November 13, 2026 and Haldex.Flash on November 13, 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.*