# Protractor Edge vs POScan

The clearest difference is in-app purchases: POScan at none against Protractor Edge's 2. POScan also leads on ads (none vs shown) and update cadence (every 5 days vs every 43 months). Protractor Edge's advantage is iOS requirement (9.0 vs 16). 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. POScan asks for nothing beyond the download.

Protractor Edge ships an update every 43 months, POScan every 5 days. The most recent releases landed on November 2, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Protractor Edge | POScan |
| --- | --- | --- |
| 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 | **Every 5 days** |
| Monetization | Freemium | — |
| Size | 21 MB | 56 MB |
| Requires iOS | **9.0** | 16 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [嵩 张](https://appshunter.io/developer/1091921941) | [ollobaby](https://appshunter.io/developer/1790456124) |

## 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 |


### POScan

[App page](https://appshunter.io/ios/app/poscan/id6746837194)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Protractor Edge free?

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

### Is POScan free?

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

### Do Protractor Edge or POScan have ads?

Protractor Edge shows ads; POScan does not.

### Which is updated more often, Protractor Edge or POScan?

Protractor Edge ships an update every 43 months, and POScan every 5 days. Most recently, Protractor Edge was updated on November 2, 2026 and POScan on October 28, 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.*