Best Free Digital Ruler Apps

4.4😞(89K ratings)

FreeIn-App Purchases

#63in Utilities

Transform your device into a versatile digital toolkit for precise measurements. Create 2D and 3D floor plans, scan rooms, and measure distances with advanced AI and computer vision. Ideal for DIY projects, home renovations, and professional use.

What We Love

🚀 Accurate measurements
🔍 Useful measuring tools
👍 Easy to use

Room to Improve

🐛 Inaccurate measurements
💰 Expensive subscription
🔒 Locked features behind paywall
🤔 Confusing UI and navigation
🙅‍♀️ Difficult to cancel subscription

Ruler • by Matrix Software Co.

Includes Camera (AR) Ruler

Strong Contender

4.2😞(405 ratings)

FreeAds

Measure objects and distances with an on-screen ruler and augmented reality. Supports inches and centimeters, with features for linear sizes, angles, area, volume, and more. Save your measurements for later use.

What We Love

👍 Basic caliper and spirit level included
✅ Option to opt-out of data selling/sharing
👌 Accurate measurements (Arabic review)

Room to Improve

📏 Inaccurate measurements
💥 Frequent app crashes
💸 Limited free functionality (5" limit)
🚫 Cannot switch to metric (cm)
🤷 Unclear AR mode usage
❌ No save or print option
↩️ Unable to exit AR mode
❓ No instructions on how to use
📱 Assumes a single phone size
📉 Ruler markings are incorrect (10ths instead of 16ths)
👎 Generally poor user experience

Ruler® by Tue Nguyen Minh

+ Photo Ruler & AR Measure

Worth Considering

4.3😞(35K ratings)

FreeIn-App Purchases

This app provides a versatile toolkit for all your measurement needs. It includes a classic ruler, a tape measure, and a camera ruler for precise measurements. Easily switch between units and document your findings by adding measurements directly to photos.

What We Love

🚀 Accurate measurements
👍 Easy to use
🔍 Convenient for small items
📏 Useful ruler tool

Room to Improve

💰 Paywall for basic features
⏱️ Limited free usage time
🔍 Inaccurate for larger objects
🙅‍♀️ Aggressive monetization tactics

More Free Digital Ruler apps to explore

Life-Size Ruler

Smartphone as a Ruler

Smartphone as a rulerMeasure lengthsMeasure distances

Transform your smartphone into a precise measuring tool. This utility app allows you to measure lengths and distances directly on your device's screen. Ideal for quick estimations and practical applications.

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by NETIGEN Kluzowicz sp. j.

The Best Ruler

Measure objects on screenCentimeter and inch scalesHorizontal and vertical display modes

Measure objects directly on your smartphone screen without needing traditional tools. This utility offers an easy-to-use interface with accurate scales in centimeters and inches, supporting both horizontal and vertical measurements.

Ruler - Screen accurate ruler

measuring app and ruler app

Instant touch measurementTwo-finger measurementReal-time results (cm/inches)

Transform your device into a precise measuring tool. Measure objects, distances, and spaces with fingertip accuracy. Offers real-time results in both metric and imperial units, with professional calibration for your specific device.

AR Ruler: Digital Tape Measure

(0)

free

Lidar Scanner: Distance・Length

AR technology for precise measurementsMeasure length, height, distance, and anglesCalculate area, volume, and perimeters

This app uses your phone's camera and AR technology to measure distances, lengths, angles, areas, and volumes of real-world objects. It offers a variety of tools for quick and precise measurements, suitable for both home and professional use.

Fast, Handy Measuring Tool

Ruler: Measure, Level & Tools

(0)

Ruler, level & compass

This app provides a digital ruler for measuring the length and diameter of small objects directly on your device. It features a millimeter scale and allows for easy sliding to measure.

Digital ruler functionalityMillimeter scaleDiameter measurement

📊 Productivity

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Measuring Tape: Digital Ruler

AR Plan 3D Room Measure App

AR-powered measurementsImperial and metric unitsRangefinder functionality

This digital ruler app provides precise measurements using your smartphone's camera. It offers imperial and metric units, a rangefinder, and a sketch mode for creating detailed plans with text editing. Easily share your creations directly from the app.

(57)

Measure & Calibrate with Ease.

AR Ruler: Measuring App

Dual measurement units (inches/millimeters)Intuitive drag-and-measure interfaceAccurate screen calibration

Transform your device into a precise digital caliper for measuring objects in inches and millimeters. Features intuitive drag-and-measure functionality and accurate screen calibration using common items.

(1)

Quick Measure - Precise Ruler

AR Measurement & Smart Tape

Digital ruler for precise length measurementsAR ruler for measuring distances in real-world environmentsMeasurement recording and storage

This utility app provides a digital and augmented reality ruler for precise measurements. It includes features like unit conversion, a built-in level, and the ability to record and store measurement data.

Ruler & Tape Measure – AR Tool

(4)

free

Length, Width, Height & Angle

CM, MM, In. Measure Anything.

(0)

Ruler - CM, MM, Inches

Multi-mode measurement (CM, MM, Inches, Fractions)Flexible starting pointsFull-direction measurement (horizontal, vertical, diagonal)

Measure lengths, widths, and diagonals accurately using your phone. Switch between metric and imperial units, and utilize flexible starting points for precise measurements in any direction. Features auto-calibration for minimal error and a screen lock to preserve readings.

(79)

Air Ruler - Objects Measure

Ruler - measuring scale

Measure with your phone

Augmented reality measurementMeasure length and areaHigh precision with AR Kit

This utility app uses augmented reality to measure the length and area of real-world objects using your smartphone's camera. It offers unlimited measurements and an ad-free experience with premium subscriptions.

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