# Protractor Edge - Clinometer — Angle Finder, Angle Measure

> Device-based angle measurement tool using a novel interface. (iPhone/iPad app by 嵩 张.)

- Source: https://appshunter.io/ios/app/protractor-edge-clinometer/id1198499762 (this page in markdown: same URL + `.md`)
- Developer: [嵩 张](https://appshunter.io/developer/1091921941)
- Category: Utilities, Education
- Price: Free with in-app purchases
- Rating: 4.50/5 from 55 App Store ratings · 46 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 21 MB
- Languages: American English, Japanese, Korean, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2017-01-30
- Data updated: 2026-08-28
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/protractor-edge-clinometer/id1198499762/reviews.md

## What is Protractor Edge?

A simple protractor. Just put your device on the angle you want to measure. Then drag the two lines to align the both sides of the angle. The degrees will be there. It is different from other protractor apps. This is a new way to measure angles. It requires neither taking photo nor putting the angle above the screen. Now start using this handy assistant to measure angles which will save you a lot of time.

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PREMIUM ACCESS SUBSCRIPTION
- Measure the world from camera
- Measure angles in photos
- No Ads
- The subscription is $0.99 yearly with trial
- Payment will be charged to iTunes Account at confirmation of purchase
- Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period
- Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal
- Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase
- Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that service, where applicable
- Terms of use: https://service.notationpad.com/terms_service.html

## Key features

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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium Access | $1.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Recent user reviews (10 of 46)

All indexed reviews: https://appshunter.io/ios/app/protractor-edge-clinometer/id1198499762/reviews.md

### 5/5 — Awesome little app to get your angle

*2025-10-11*

Simple, effective and easy to use.

### 5/5 — Ark

*2025-09-23*

Don’t know yet

### 5/5 — Great

*2024-08-09*

Useful

### 5/5 — Works

*2024-02-15*

Work

### 1/5 — 必须要内购才让继续使用

*2023-11-06*

太恶心了，要内购才让使用，直接设个收费软件不就行了，为了骗下载量？

### 3/5 — Glazier

*2023-09-20*

Use it daily when measuring glass

### 1/5 — 坑

*2023-08-30*

真不好用，一点开就让购买，我甚至还没学会怎么使用！购买的界面屡次跳出来，差差评

### 1/5 — 평가사용기간도 없네

*2023-05-16*

헐  삭제

### 4/5 — Needs more precision with setting desired angle

*2023-05-07*

Still cool

### 5/5 — Protractor

*2023-03-16*

This thing works excellent it does everything I wanted to do. I have an even found out all the stuff it does yet and everything it claims to do it does and it works great.

## Frequently asked questions about Protractor Edge

### What does Protractor Edge do?

This app allows you to measure angles directly on your device. You place your device on the angle you wish to measure and then drag two lines to align with the angle's sides. The app will then display the degree measurement.

### What are the key features of this app?

The core feature is its unique method of measuring angles directly on your device without needing to take photos or place the angle on the screen. Premium features include measuring angles within photos and using your device's camera for measurements.

### How much does Protractor Edge cost?

The app offers a free version with ads. A premium subscription is available for $0.99 yearly, which removes ads and unlocks additional features like measuring angles in photos and from the camera. A free trial period is also offered.

### What devices is Protractor Edge compatible with?

The description mentions payment being charged to an iTunes Account, suggesting compatibility with iOS devices. Specific iOS version requirements are not detailed but it is designed for mobile devices.

### What are common use cases for this app?

This app is useful for quickly determining angles in DIY projects, woodworking, construction, or any situation where an accurate angle measurement is needed without a physical protractor. The premium features expand its utility to analyzing existing images or live camera feeds.

## Version history (last 3 releases)

### 2.0.1 — 2024-03-24

- Fixed displaying wrong language
- Fixed bugs

### 2.0.0 — 2021-08-04

- Measure the real world with camera
- Measure angels in photos
- Fixed bugs

### 1.0.0 — 2017-01-30

This app has been updated by Apple to display the Apple Watch app icon.

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## More apps by 嵩 张

- [Notation Pad-Sheet Music Score](https://appshunter.io/ios/app/notation-pad-sheet-music-score/id1091921942)
- [Guitar Notation - Tabs&Chords](https://appshunter.io/ios/app/guitar-notation-tabs-and-chords/id1144464459)
- [Guitar Notation Pro](https://appshunter.io/ios/app/guitar-notation-pro/id1144465456)
- [Notation Pad Pro - Sheet Music](https://appshunter.io/ios/app/notation-pad-pro-sheet-music/id1163705635)
- [Notation Scanner - Sheet Music](https://appshunter.io/ios/app/notation-scanner-sheet-music/id1260311003)

All apps by 嵩 张: https://appshunter.io/developer/1091921941

## Related topics

[angle ruler](https://appshunter.io/ios/topics/angle-ruler) · [degree protractor](https://appshunter.io/ios/topics/degree-protractor) · [degree finder protractor](https://appshunter.io/ios/topics/degree-finder-protractor) · [clinometer](https://appshunter.io/ios/topics/clinometer) · [vehicle clinometer](https://appshunter.io/ios/topics/vehicle-clinometer)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*