Ruler App – Measure length in inches + centimeters

Contains adsIn-app purchases
4.2
37.2K reviews
5M+
Downloads
Content rating
Everyone
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About this app

Ruler app for your phone and tablet. Measure everything with a beautiful on-screen ruler. Choose between inches and centimeters. Tap the screen to start using the best multi-touch measuring system and find the size of all curious objects around you. And all this for free.

• Fast and responsive interface with beautiful modern design that looks great both on phone and tablet
• Imperial (inch) and Metric (centimeter / millimeter) units
• Very simple so everyone can use it - touch the screen and move the left and right handles with your fingers
• Smart history for your latest measurements
• Copy current length to clipboard and paste it in another app
• Multi-touch caliper tool functionality
• It is a handy tape measure, always in your pocket
• Calibrate the app if units are inaccurate. Grab a real ruler and follow instructions in Settings menu
• Learn more and send feedback on http://ruler.mobi
Updated on
Sep 24, 2018

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
App activity, App info and performance, and Device or other IDs
This app may collect these data types
App activity, App info and performance, and Device or other IDs
Data isn’t encrypted
You can request that data be deleted
4.2
37.2K reviews
Andrew
March 18, 2021
It's always out a little. They should really have you calibrate it with a larger increment so the accuracy is better. The larger the increment the less significant things like small perspective errors and rule widths are. That said, it can be useful if you don't need it to be perfect and just need a rough estimate.
177 people found this review helpful
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Theresa Marie
March 19, 2022
I'm thrilled with this app! I don't know why I didn't have this a long time ago. I don't know how many times I've needed to measure something out of the blue & couldn't find my ruler 🤷‍♀️ I really like that each measurement is saved automatically, with the ability to label them. It's very handy 🙂 Thank you!
46 people found this review helpful
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A Google user
November 14, 2019
Horrible app. I went to adjust the ruler calibrate to accurate size. It said I could use a credit card. I clicked done , it didn't even save the calibration in the least. It just kept saying the length was 12 inches. I wish my phone was that long. What utter lies. WORST APP EVER. The developers should be ashamed of themselves.
194 people found this review helpful
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What's new

Welcome to the latest version of the best ruler app. What was changed:
• Better support for Android Oreo
• More accurate ruler
• Bug fixes and performance improvements