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Smart Protractor APK for Android

5M+
Free
Aug 18, 2025

Measure angles quickly and easily with your reliable assistant.

Download Smart Protractor APK 1.6.1 12MB

What is Smart Protractor?

The Smart Protractor application will always be useful when a special tool isn’t at hand. Sometimes, in life, there’s a sudden need to measure an angle of inclination or to calculate a formula during a lesson. This program is created just for that. Some users, having tried such a service, never go back to calculating angles with a traditional tool and ruler. The mobile application will be useful not only for students and schoolchildren but also for ordinary household users for domestic purposes.

The application can calculate the angles of inclination of an object using three operating modes:

  • “Plumb Bob Mode” function, for inclination. A special plumb bob on the smartphone screen shows the angle of inclination of your device.
  • For the angle “Touch Mode”. After you have placed any object on the screen, tap the screen.
  • “Camera Mode”. Uses an image through the camera.
  • Features and unique capabilities of the application.
  • Shows units of inclination, degrees, percentages, radians.
  • Ability to calibrate to a zero point.
  • Turning the orientation sensor on and off.
  • Convenient and beautiful, intuitive application interface.

Those who wish can watch a detailed review of the application by searching the internet. The program can fully replace a protractor. Just point the camera, which starts in the application, at the desired object and fix its angles on the screen. You won’t need a notepad and pen to record the indicators, because there is a screenshot function that moves all the pictures to the memory of the mobile gadget. By downloading and installing the application from the store, you can level any object in the house, hang a picture evenly, or simply determine the angle of inclination for any household purposes. Bring simplicity, ease and interest to your life to any process related to angle measurement with the Smart Protractor program.

Video of Smart Protractor
Screenshot Smart Protractor 1
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Download Smart Protractor APK for Android

What's New in Version 1.6.1

- v1.6.4 : More models have been calibrated
- v1.6.2 : Support for Android 16

Available Files

System Requirements

OS Version
Android 6.0 (Marshmallow) or higher
Architecture
Varies by file (Which one do I need?)
Disk Space
~20 MB free space required
RAM
1 GB
Internet
Not required
Google Services
Required
Permissions (12)
  • Internet
  • Camera
  • Access Network State
  • Vibrate
  • Wake Lock

APK File Details

Package ID kr.sira.protractor
Available on Google Play
Developer Smart Tools co.
License Free
Monetization Contains Ads  
Content Rating Everyone
Interface Language
English +0

English

APK Verification & Virus Scan Results

No Virus Signature Verified Safe & Original

Virus scan: Clean (0/65) View report. This APK is free of malware and its signature matches the official developer release.

Show File Details (SHA-256, SHA-1, MD5)

SHA-1 Signature:

ef45bacd52c25843705984109b7a883cb7e92a81

SHA-256 Hash:

bdf6b9fc1906ee7ef1205d954b973179f53f7b83fa3cf1a0dca49b5330b40297

MD5 Checksum:

a3a893776e91e752757cce9c650ebef7

Frequently Asked Questions

Is Smart Protractor safe to download?

Yes, Smart Protractor is safe to download. The APK is scanned on every update — no malware or viruses detected. You can verify the full scan report in the Security section above.

How to install XAPK file?

XAPK is a split APK package. Standard Android installer cannot open it directly. Use 'SAI' or 'XAPK Installer' — they handle XAPK files automatically. Download the installer, open the XAPK file with it, and follow the on-screen steps. Read more

What Android version does Smart Protractor require?

Smart Protractor requires Android 6.0 (API 23) or higher. Optimized for Android 15 (API 35).

Is Smart Protractor free?

Yes, it is free to use, but it is ad-supported.

How to update Smart Protractor to the latest version?

Download the latest APK from this page and install it over your existing version — no need to uninstall first. Your data and settings will be preserved. We update the file as soon as a new version is released.

Does Smart Protractor require Root access?

No root is required for basic use. Smart Protractor works on standard Android for CPU info, RAM, battery, sensors, and network stats. Root unlocks a small set of advanced system parameters that Android restricts by default.

What processor architecture does Smart Protractor support?

Smart Protractor supports universal. If you are unsure about your device architecture, check the Device Info section on this page.

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User Reviews & Ratings

Global rating(Play Store): 3.89(17.6K)
Site Rating: 5(1)
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