Smart Ruler

Contains ads
3.9
13.3K reviews
1M+
Downloads
Content rating
PEGI 3
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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
Aug 14, 2024

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

Ratings and reviews

3.8
12.3K reviews
Ben Watkins
December 13, 2024
This has been a great app for many years but recently the adverts have taken over the screen so you can't use the app properly and you can't get rid of them. So the app is rendered pretty useless. I hope they sort this out soon before I switch to a different app.
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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.
11 people 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.
25 people found this review helpful
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What’s new

- v1.6.10 : More models are calibrated
- v1.6.9 : Support for Android 14

App support

About the developer
스마트툴스(주)
수성구 범어천로 126, 102동 1207호(범어동, 코오롱 하늘채 수) 수성구, 대구광역시 42117 South Korea
+82 53-744-9674

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