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Ruler 2.0 - inch, mm, cm

Ruler 2.0 - inch, mm, cm

High measurement accuracy

205 ratings
71 reviews
📚 Education
🔧 Utilities
Free

Details

  • Released
  • Updated
  • February 13, 2018
  • November 14, 2025

Features

Developer

Oleg Osipov
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Ruler 2.0 - inch, mm, cm screenshot #1 for iPhone
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Ruler 2.0 - inch, mm, cm screenshot #4 for iPhone
Ruler 2.0 - inch, mm, cm screenshot #5 for iPhone
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About

This app provides a precise on-screen measuring tool for your iPhone or iPad. Easily measure length and width in centimeters, millimeters, or inches, with options to save measurements as photos and customize the ruler's appearance. It's designed for accurate, user-friendly measurements.

✓On-screen ruler
✓Measure length and width
✓Centimeters, millimeters, inches
✓Save measurements as photos
✓3 ruler color options
✓Manual measurement adjustment
Show original description

What users say

Summarized from real user reviews of Ruler 2.0. Based on 205 reviews and a 3.9/5 average, it highlights the 5 positives and 5 negatives reviewers mention most about this Utilities app.

Positive things

  • 👍Simple and easy to use
  • 💡Precise measurements (when working)
  • ✨Free with no ads
  • ✅Lightweight and small size
  • 🎯Good for small item measurements

Negative things

  • 🐛Frequent crashes
  • 📏Inaccurate measurements on newer phones
  • 📱Not optimized for high DPI screens
  • 📉Scale is off by ~50% on newer models
  • ⚠️Support link is shady
See all reviews

What's New in Ruler 2.0

2.0.8

November 14, 2025

Even better measurement experience.

User reviews

Most RecentHighest RatedLowest Rated

Shame

Crashes after a few seconds 🫤
Jimbo_ctJimbo_ct

Sizing is off for newer, larger phones (high dpi)

This app was a very good app, but it’s completely unusable now if you’ve got a large max phone, I think it’s the high dpi screen that makes the inches way too small. The inches are about the size of a centimeter in this app. It needs to be updated to support high DPI large phones
LouBaby1911LouBaby1911

wrong scale in iphone16

hi
wrong dimension measurement on iphone16
please solve
Ali AsghariAli Asghari

Keeps crashing

Would be just what I want if it stayed open long enough to see.
Pity. Been like this for ages so no use whatsoever
ZenJonZenJon

Screen scale wrong

Needs updating for newer iPhone displays as 1cm is showing smaller that 4mm.
KioscoBeachNo7KioscoBeachNo7
See 66 more reviews

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User experience

🐞

Reported Bugs

8 issues

Crashes after a few seconds

Bug

Keeps crashing

Bug

Wrong scale/dimension measurement on newer iPhones (13, 14, 15 series, SE 2022)

Bug

Inches are too small (e.g., 1cm shows as smaller than 4mm)

Bug

Measurements are off by about half

Bug

Screen scale wrong (1cm showing smaller than 4mm)

Bug

Grid is shrunk on newer iPhones

Bug

App frequently corrects '20' to '2.0'

Bug
✨

Requested Features

7 requests

Update for newer iPhone displays (high DPI)

Feature

Manual adjustment for screen size/resolution

Feature

Add option to manually enter dimensions

Feature

Add inch fractions as measurement option

Feature

Allow adjustable text font size when saving

Feature

Implement lighter background option (plain white)

Feature

Make the measuring line not reset based on finger position

Feature

FAQ

What does Ruler 2.0 do?

Ruler 2.0 is an on-screen measuring tool for your iPhone and iPad. It allows you to accurately measure lengths and widths directly on your device's screen using centimeters, millimeters, or inches.

What are the key features of this ruler app?

Key features include precise on-screen measurements, support for centimeters, millimeters, and inches, the ability to save measurements as photos, and three customizable ruler color options for user comfort.

Is Ruler 2.0 free to use?

Yes, the application is completely free to use. There are no in-app purchases or advertisements mentioned, making it a free utility for all users.

What devices is Ruler 2.0 compatible with?

This ruler app is designed for use on the iPhone and iPad, providing a convenient measuring solution for Apple mobile devices.

How can I ensure the highest accuracy when measuring?

For even higher accuracy, you can pan with two fingers anywhere on the screen. Additionally, you can manually adjust the measurement result by tapping on it, ensuring precise readings for your needs.