# Protractor

> Check angle and slope. Use the camera view !!!

Canonical page: [https://chrome-stats.com/d/com.exatools.protractor](https://chrome-stats.com/d/com.exatools.protractor)

## Overview

- **ID:** `com.exatools.protractor`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** EXA Tools
- **Category:** TOOLS
- **Downloads:** 1,615,094
- **Rating:** 4.28 / 5 (5,861 ratings)
- **Version:** 1.6.00
- **Last updated:** 2026-01-14
- **First published:** 2016-02-08
- **Publisher country:** PL
- **Size:** 12 MB
- **Data as of:** 2026-09-03
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.exatools.protractor)
- **Website:** [https://examobile.com](https://examobile.com/)
- **Privacy policy:** [https://examobile.pl/privacypolicy/?app=Protractor&dev=EXA%20Tools](https://examobile.pl/privacypolicy/?app=Protractor&dev=EXA%20Tools)

## Description

Protractor is a versatile Chrome extension acting as a smart instrument to measure angles and slopes using your device's camera. It offers two free measurement modes: Touch Measure, where you set angles by touching the screen with the camera view active, and Plumb Bob Measure, which helps determine slopes via a pendulum that requires calibration.

For advanced users, the Premium Polygon Measurement mode enables drawing shapes directly on your screen or photos to check all angles accurately. This mode supports color customization, helper lines, and multiple angle units. Screenshots can be taken in all modes, allowing you to save and share your measurements effortlessly. Whether measuring buildings, mountains, or any objects around you, Protractor combines convenience with precision for on-the-go angle and slope checks.

## Rankings

- #51,400 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.CAMERA`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.VIBRATE`
- `android.permission.WAKE_LOCK`
- `com.android.vending.BILLING`
- `com.exatools.protractor.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`
- `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE`
- `com.google.android.gms.permission.AD_ID`

## Review summary

Protractor is widely praised as a useful, free, and easy-to-use app with accurate measurements and a handy camera feature. Users appreciate its intuitive design and convenience for tasks like aligning solar panels. However, reviews repeatedly flag drawbacks: intrusive ads (especially during camera use), inconsistent angle detection, export issues (exported screenshots as PDFs not including the background), and UI friction that can hinder closing prompts. Overall, strong core functionality but notable annoyances.

### Pros

- Camera feature is very useful
- Easy to use and user-friendly
- Very accurate results
- Works well and is free to use
- Handy and convenient tool

### Cons

- Intrusive ads, especially during camera use
- Angle/gravitation detection is inaccurate
- Screenshot export saves as PDF and doesn't capture the background
- Cannot close without tapping Add (UI friction)
- Some users find it hard to use / not intuitive

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.exatools.protractor)