# ProTrac

> Digital protractor app for measuring angles using device sensors. (iPhone/iPad app by Edward Legler.)

- Source: https://appshunter.io/ios/app/protrac/id1078720848 (this page in markdown: same URL + `.md`)
- Developer: [Edward Legler](https://appshunter.io/developer/1078720847)
- Category: Utilities, Education
- Price: Free
- Rating: 4.30/5 from 3 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.1 · 12 MB
- Languages: American English
- Released: 2016-02-01
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/protrac/id1078720848/reviews.md

## What is ProTrac?

ProTrac is a new style of Protractor.
Lay the device flat on a surface and draw lines at different angles alongside your iPhone or iPad.
Or use the side of your iPhone or iPad to measure the angle between two lines.
ProTrac uses attitude to keep track of the yaw angle which then rotates an image of a protractor.

## Key features

- Measure angles on flat surfaces
- Measure angles between two lines
- Uses device attitude sensors
- Rotates protractor image
- Draw lines at different angles

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/protrac/id1078720848/reviews.md

### 5/5 — Angle gauge

*2023-07-23*

Tape an old phone to your wrench to use this as a torque angle guage!

### 4/5 — Handy app

*2016-02-09*

Useful little app. I can use it to measure angles on a flat surface using the edge of my phone. Great for prints and drawings.

### 5/5 — Simple and awesome!

*2016-02-09*

This app is simple yet powerful.   It's like having a drafting machine in the palm of your hand.   I use it to draw simple yet accurate sketches and diagrams.  Give it a try.  You'll find lots of uses for it.

## Frequently asked questions about ProTrac

### What is ProTrac?

ProTrac is a digital protractor application designed to measure angles using your iPhone or iPad. It allows you to draw lines at different angles or measure the angle between two existing lines.

### How does ProTrac measure angles?

ProTrac utilizes the device's attitude sensors to track the yaw angle. This data is then used to rotate an image of a protractor, enabling accurate angle measurements.

### What devices does ProTrac support?

ProTrac is supported on iPhone and iPod devices. It was released on February 1, 2016, and its latest version is 1.1, last updated on February 8, 2016.

### Is ProTrac free to use?

Yes, ProTrac is available for free. There are no in-app purchases or advertisements associated with this utility application.

### What is the age rating for ProTrac?

ProTrac has an age rating of 4+. This indicates it is suitable for users aged four and older.

### How accurate is ProTrac?

ProTrac has received a rating of 4.3 stars from 3 ratings, suggesting a generally positive user experience regarding its functionality and accuracy.

### Can ProTrac be used offline?

As a utility app that relies on device sensors for measurement, ProTrac does not require an internet connection to function. You can use it offline to measure angles.

## Version history (last 2 releases)

### 1.1 — 2016-02-08

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

Updated the App Name
Min deployment target changed to iOS 8.1

### 1.0 — 2016-02-01

No release notes.

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| App | Rating | Price | Category |
| --- | --- | --- | --- |
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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 2026-06-10.*