Smart Protractor

Name: Smart Protractor
Rating: 4.05 (18133 reviews)
Author: Smart Tools co.

By: Smart Tools co.

Measure the angle and slope of an object with your phone.

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Features & Capabilities

Smart Protractor is a versatile tool from the Smart Tools collection designed to measure the angle and slope of objects using your phone. It offers three distinct modes: Touch mode for direct angle measurement by touching the screen after placing an object, Plumb mode for slope detection supported by a weighted sensor, and Camera mode which utilizes your device's camera to function as a goniometer and inclinometer.

Key features include multiple tilt units such as degrees, percent, and radians, zero calibration for accuracy, and an option to enable or disable the orientation sensor. The pro version enhances user experience by removing ads, providing various tilt units, enabling screen capture, and including additional tools like a ruler, level, and thread pitch gauge. This extension is ideal for professionals and hobbyists needing precise angle measurements for tasks across construction, DIY projects, and design.

User Growth & Download Statistics

App Developer Tools

By:

Downloads:

Rating:

Version:

1.6.4 Last updated: 2026-06-02

Version code:

Creation date:

2010-09-11

Publisher country:

Permissions:

android.permission.CAMERA Very high risk
com.google.android.gms.permission.AD_ID Moderate risk
android.permission.ACCESS_ADSERVICES_AD_ID Low risk
android.permission.ACCESS_ADSERVICES_ATTRIBUTION Low risk
android.permission.ACCESS_ADSERVICES_TOPICS Low risk
android.permission.FOREGROUND_SERVICE Low risk
android.permission.INTERNET Low risk
android.permission.WAKE_LOCK Low risk
com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE Low risk
android.permission.ACCESS_NETWORK_STATE Safe

Size:

12.94MB

Email:

an*****@gmail.com

URLs:

Website ,Privacy policy

Full description:

Source:

Google Play Store

Data ingested on:

2026-06-23

Compare stats and ranking:

Ranking

# 23,042 ▼ 26

For Developers

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Contact the developer

Chrome-Stats does not own this Android app. Please use these information below to contact the Android app developer.

Developed by:

Smart Tools co.

Google Play Store

https://play.google.com/store/apps/details?id=kr.sira.protractor

Email:

an*****@gmail.com

Website:

http://smart-tools.biz

User Reviews

Reviewers praise Smart Protractor for its simple, quick interface and reliable angle readings, with some claiming 0.1-degree accuracy on supported devices. It’s seen as very useful for various tasks and generally meets users’ needs. However, intrusive ads at startup can disrupt usage for some, and camera mode raises privacy concerns due to heavy permissions and cookies, sometimes blocking access. A few users also report instability in camera mode, such as the image shifting without input. Overall, it’s easy to use and effective when ads and permissions aren’t problematic.

Pros

Simple and easy to use; quick to learn
Accurate and precise measurements when the hardware supports it (claims of 0.1-degree accuracy)
Very useful for various angle measurements and layout tasks
Reliable performance that meets user needs (does what it’s supposed to)
Ads are non-intrusive for many users and do not significantly detract from use

Cons

Intrusive startup ads that interrupt usage and can be hard to close
Camera mode requires many permissions and tracking cookies, causing privacy concerns and sometimes blocking use
Camera mode can be unstable, with the on-screen image moving without input