Ruler - On-screen Measure

Contains ads
3.4
1.38K reviews
Content rating
Everyone
500K+
Downloads
Content rating
Everyone
Learn more
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About this app

Measure the objects around you right on your screen.

Ruler (NeoRuler) turns your smartphone screen into a handy measuring tool. With no extra hardware, measure lengths in centimeters and inches, and convert units — all in one app.

■ Key features
• On-screen ruler — show a scale on your screen and measure objects directly
• Measurement markers — measure the distance between two points; tap the ruler to move a marker fast
• Copy & share measured values
• cm / inch scales (choose inch with 1/8 or 1/10 divisions)
• Single-line ruler — measure a length quickly on one line
• Unit converter — convert length units with a dropdown, copy the result, swap sides
• Screen calibration — fine-tune the scale to your exact device size
• Keep screen on while measuring · haptic feedback
• Landscape-optimized — measure longer lengths on a wide screen
• Dark mode — comfortable to use in low light

■ Great for
• Quickly measuring something when no ruler is around
• Working with both cm and inch
• Anyone who often needs unit conversion

Start using your phone as a ruler today!
Updated on
Jun 20, 2026

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.
This app may share these data types with third parties
Device or other IDs
No data collected
Learn more about how developers declare collection
Data is encrypted in transit

Ratings and reviews

3.4
1.33K reviews
A Google user
February 16, 2019
like most of these apps. it is very difficult to get past the calibrate step as they do not provide instructions anywhere. if you click yhe information button you get taken to an ad and a place to give them your email address .
161 people found this review helpful
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Masoome Hassan
May 1, 2020
Wish I could give this app 0 stars , very difficult/hard to use and TOOOO MANY ADS like bruh I had 1 then 2 then 3 ads while I was MEASURING then 4 and then I just closed the app . All the other reviews were right this app is trash
52 people found this review helpful
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A Google user
January 28, 2019
ok.. easy to use. just a suggestion, make an option if we move the phone horizontally or vertically (during measuring) the ruler oso move.
155 people found this review helpful
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What’s new

• Measurement markers — measure the distance between two points
• Tap the ruler to move the nearest marker instantly
• Copy & share measured values
• Improved unit converter — dropdown picker, copy result, swap sides
• Keep screen on while measuring / haptic feedback options
• Calibration guide and a fresh new icon
• Stability improvements and bug fixes