Smart Ruler

Contains ads
13.3K reviews
Content rating
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About this app

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

This app measures the length of a small object by touching the screen.

Usage is very simple.
1. Put an object on the screen of your device.
2. Adjust the object to the left of the screen.
3. Touch the screen, adjust the red line and read the length.

* Main features :
- Multi-touch
- Meter <-> Inch
- Background color
- Material design

I calibrated the app on a lot of Android devices. If it is not accurate, you can enter the actual width with [Calibration] menu.

* Pro version added features:
- No ads
- Caliper mode
- Architectural and Engineering scales
- Ruler extension
- Protractor, 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.
Updated on
Dec 15, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted
13.3K reviews
Barry Foxworth
August 3, 2022
I set it to (") and it goes back to (mm), it won't stay out. Next when I cover my device's screen with my object, I can't see the screen to change the red lines. It's very confusing! It just doesn't work. Plus, when setting font to large, the entire screen is so tiny, I can't read anything or even see the tiny numbers.
1 person found this review helpful
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Allthe Dicks
May 22, 2022
Yea that's my name... just wanted to share my story with this app. Great easy install and accurately measured the distance between my wheel nuts when I was looking for a new spare. Exactally ,100mm . Second hand Rims are so hard to find new is pricey. Excellent tool. Although not sure how I calibrated without a ruler. But it was accurate out of the box.
11 people found this review helpful
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Ten - The UwU Queen of Cringe
July 9, 2022
The app opens up tabs in my browser as supposed "ads" which is an instant red flag. I don't mind normal ads, but when an app starts randomly opening another app or opening web page then that's just borderline virus behavior. There is no reason at all that an app should be opening up my browser unless I clicked on a little button that said "Open my browser!"
9 people found this review helpful
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What's new

- v1.6.6 : Support for Android 13
- v1.6.5 : More models are calibrated