Ruler App: Measure centimeters

Nikola Kosev

Contains adsIn-app purchases

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 a 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 the current length to the clipboard and paste it into 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 the instructions in the Settings menu
• Learn more and send feedback at https://ruler.mobi

Ratings and reviews

Simple app, does what you think it does, and isn't obnoxiously loaded with ads, or gated behind a subscription. I also checked the measurements with a real ruler and they match up very precisely with less than 1/32 inch error. No complaints from me!

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.

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.

What’s new

Welcome to the latest version of the best ruler app. What was changed:
• Added support for Android 14
• More accurate ruler
• Bug fixes and performance improvements