10 Best Ruler Alternatives: Apps Like Ruler for iPhone (2026)

Whether you want more options like Ruler or a completely different take on the same concept, our curated list of 10+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.

Top Alternatives to Ruler

Ruler • by Matrix Software Co.

Includes Camera (AR) Ruler

Editor's Choice

🔧 Utilities

4.2😞(419 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 - CM, MM, Inches by Noadit, Inc.

CM, MM, In. Measure Anything.

Strong Contender

🔧 Utilities

3.5😞(79 ratings)

FreeAdsIn-App Purchases

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.

What We Love

👍 Simple and easy to use
📏 Accurate measurements (for some)
💡 Useful for small objects
✨ Clean interface
🚀 Fluid performance
🛠️ Good basic functionality

Room to Improve

😠 Excessive and intrusive ads
🚫 Ads block measurements
🔊 Loud and shocking ads
💸 No option to pay for ad-free (or purchase lost)
📉 Inaccurate inch measurements (decimal vs. fractional)
⚠️ Shady download practices
⚫ Black screen issue
👆 Finger obscures measurements
📱 Inaccurate on specific devices
👎 Lost paid features after update

Screen Ruler: Measure Length by 向阳杨

CM, MM & Inch Measuring Tool

Worth Considering

🔧 Utilities

3.7(26 ratings)

FreeAdsIn-App Purchases

Screen Ruler: Measure Length screenshot 1

Turn your iPhone or iPad into a precise measuring tool. Easily measure lengths in centimeters or inches with features like magnifier mode and haptic feedback. Ideal for daily tasks, office use, DIY projects, and on-the-go measurements.