Smart Protractor

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

App info

Version :

1.6.1

Category :

Tools

Update :

June 03, 2025

Installs :

5,024,376

Developer :

Smart Tools co.

Requires Android :

Android 4.4+

Content Rating :

Everyone

Get it on :

Download APK

App description

Android App Analysis and Review: Smart Protractor, Developed by Smart Tools co.. Listed in Tools Category. Current Version Is 1.6.1, Updated On 03/06/2025 . According to users reviews on Google Play: Smart Protractor. Achieved Over 5 million Installs. Smart Protractor Currently Has 18 thousand Reviews, Average Rating 4.0 Stars

Smart Protractor is in the 1st set of the Smart Tools collection.

This app measures the angle and the slope of an object. It has three protractor modes.

1. Touch mode : for angle. After putting an object on the screen, touch the screen.
2. Plumb mode : for slope. A weight shows the slope of your device.
3. Camera mode : goniometer, inclinometer. It uses camera view.

* Main features:
- Tilt units (degree, percent, radian)
- Zero calibration
- Orientation sensor on/off
- Material design

* Pro version added features:
- No ads
- Various Tilt units
- Screen capture
- Ruler, level, thread pitch

* Do you want more tools?
download [Smart Ruler Pro] and [Smart Tools] package.

For more information, watch YouTube and visit the blog. Thank you.

We are currently offering version 1.6.1. This is our latest, most optimized version. It is suitable for many different devices. Free download directly apk from the Google Play Store or other versions we're hosting. Moreover, you can download without registration and no login required.

We have more than 2000+ available devices for Samsung, Xiaomi, Huawei, Oppo, Vivo, Motorola, LG, Google, OnePlus, Sony, Tablet ... with so many options, it’s easy for you to choose games or software that fit your device.

It can come in handy if there are any country restrictions or any restrictions from the side of your device on the Google App Store.

What's New

- v1.6.1 : Minor fix
- v1.6.0 : Support for Android 15

Rate and review on Google Play store

4.0

18,095 total

5 66.1

4 8.0

3 6.0

2 4.0

1 16.0

Total number of ratings

Total number of active users rated for: Smart Protractor

Total number of installs (*estimated)

Estimation of total number of installs on Google Play, Approximated from number of ratings and install bounds achieved on Google Play.

Recent Comments

Ryan

Great App, does exactly what it says without clutter. 3 modes each useful for variety of tasks, drawing and measurement based. Interesting use of your phones camera to impose protractor image over. Haven't really tested this mode much, but was pleased to discover this ability and can see numerous situations where this could be useful practically.

Stuart

As a woodworker, I might use this and it seems OK, but could do with markings for commonly used angles like 45, 15, 30, 60 or these numbers highlighted. Also when using the touch setting there should be an option that will snap it to those angles because it's just too fiddly to hone in to the exact angle. If it had those features then it could be genuinely useful, otherwise it's just a novelty.

Rikk Clark

Awesome app! I just wish you could tap on the angle and manually put in the degree and then match the desired angle to that number. Unless I'm missing it and it has that option (which is entirely possible) other than that it's exactly what i need. Thanks for the great app 👍

Laura B

Simple, works great! I use it to measure head of bed angle.

thomas 971

This is a user friendly app that is perfect for me when setting up knives for sharpening. I am able to set and check the setting with ease. Thanks.

Derek Sinclair

uninstalled after first attempt to use the camera function, needs to many permissions and hundreds of cookies enabled to work, I gave up after turning off access to 120 tracking cookies and wasn't even a third of the way there.