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Ruler - Accurate Ruler

Ruler - Accurate Ruler

by 祥祎 刘

41 ratings
96 reviews
🔧 Utilities
📊 Productivity
Free

Details

  • Released
  • Updated
  • February 18, 2016
  • April 8, 2025

Features

Developer

祥祎 刘
✨Promote your app ✨
Ruler - Accurate Ruler screenshot #1 for iPhone
iphone
ipad
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Reviews summary↘︎
⭐96
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🔄6+ apps
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❓5 answered
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About

This application provides a precise measurement tool by rendering according to your device's screen width specifications. It has been tested on a wide range of Apple devices to ensure accuracy for your measuring needs.

✓Accurate screen-based rendering
✓Device-specific calibration
✓Wide device compatibility
✓Precise measurement tool
Show original description

What users say

Summarized from real user reviews of Ruler. Based on 41 reviews and a 2.7/5 average, it highlights the 7 positives and 10 negatives reviewers mention most about this Productivity app.

Positive things

  • ✅Accurate measurements compared to physical rulers
  • 👍Simple and intuitive user interface
  • 🎯No intrusive ads or minimal advertising
  • ⚡Fast and responsive performance
  • 🆓Free to use application
  • 📱Works well on older iPhone models (6S, 6+, 7)
  • 🎨Clean and minimalist design

Negative things

  • 🐛Blank white screen on newer devices
  • ❌No support for iPhone 12 and newer models
  • ❌No support for iPhone X and iPhone 11
  • 🔄App not updated in years
  • ⚠️Device compatibility detection issues
  • 🔐Privacy concerns - clipboard access without permission
  • 📐Inaccurate measurements on some devices
  • 🔧Broken toggle switches and non-functional UI elements
  • 💰Misleading free app that charges users
  • 📱iPad compatibility issues
See all reviews

What's New in Ruler

7.0

April 8, 2025

Bug fixes and performance improvements for iOS18

User reviews

Most RecentHighest RatedLowest Rated

Pretty funny interface

When i opened the app i thought it’s sole purpose was to simply tell you that it’s correct about your screen size 😂
gabrielus123gabrielus123

Doesn’t work on iphone 16 pro

Doesn’t work on iphone 16 pro
MozbiusMozbius

Great app

Has worked well for many years and looks nice, thanks!
a person who is writing 7h15a person who is writing 7h15

Dead

App no longer functions and when launched it requested access to my Authenticator pasted code. The app just displays a white screen, a broken toggle and 3 links. One of those links is just to write a review.
RossMcRossMc

Used to work fine but it’s broken now

Used to work fine but now there is no ruler on the screen, the app is rotated and all I can ever see is the switch between CM and IN.
TabjuTabju
See 91 more reviews

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User experience

🐞

Reported Bugs

10 issues

White/blank screen display on newer iOS versions

Bug

App crashes and freezes on launch

Bug

Ruler not rendering or displaying

Bug

Toggle switches stuck in grey/disabled state

Bug

Incorrect device identification (iPad size misidentification)

Bug

Incompatibility with iOS 13.3 and newer

Bug

Authenticator code clipboard access on launch

Bug

Screen rotation issues

Bug

Inaccurate ruler scaling on iPhone 8, 11, 12, 13, 16 Pro

Bug

App requests rating before allowing use

Bug
✨

Requested Features

7 requests

Support for iPhone 12, 13, 14, 15, 16 and newer models

Feature

Millimeter measurement option

Feature

Longer ruler display

Feature

Fractional inches (1/16, 1/8) instead of decimal inches

Feature

Support for newer iPad models

Feature

Ability to disable ads

Feature

Better device detection and compatibility

Feature

FAQ

What does this app do?

This application functions as a digital ruler, providing accurate measurements by rendering based on your specific device's screen width. It aims to be more precise than other ruler apps by calibrating to your device's dimensions.

How is this ruler accurate?

The app ensures accuracy by rendering the ruler according to the exact screen width specifications of the device you are using. This calibration method is designed to provide a precise measurement tool.

Is this app free to use?

Yes, this application is completely free to use. There are no in-app purchases or advertisements, offering a straightforward and cost-free measurement experience.

What devices is this app compatible with?

The app has been tested and confirmed to be accurate on a wide range of Apple devices, including various iPhone, iPad, and iPod Touch models from older to newer generations. A comprehensive list is available in the app's description.

What are common use cases for this app?

This app is useful for quickly measuring objects around you when you don't have a physical ruler available. It's ideal for tasks requiring approximate lengths, such as checking if an item will fit in a space or comparing sizes.