Best Mm Ruler Screen Apps

237+ iOS apps curated and reviewed

3.7 avg rating
19 free apps
Updated November 2026

From beginner-friendly picks to power-user tools, our mm ruler screen list covers 237+ iPhone apps updated through November 2026. Compare ratings, prices, and screenshots in one place.

Compare top Mm Ruler Screen Apps (November 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Ruler: CM, MM & InchesRuler: CM, MM & InchesFree5.0★ (2)YesYesOct 2026
2Ruler - CM, MM, InchesRuler - CM, MM, InchesFree3.5★ (79)YesNoNov 2026
3RulerAppRulerAppFree——NoSep 2026
4Screen Ruler: Measure LengthScreen Ruler: Measure LengthFree3.7★ (26)YesYesOct 2026
5Millimeter Pro - screen rulerMillimeter Pro - screen ruler$3.994.4★ (109)NoNoOct 2026
6Ruler®Ruler®Free4.3★ (35K)NoYesNov 2026
7Super RulerSuper RulerFree—YesNoMay 2026
8Ruler / Measuring TapeRuler / Measuring TapeFree4.4★ (236)NoNoOct 2026

Top Picks for Mm Ruler Screen

Ruler: CM, MM & Inches#1

Ruler: CM, MM & Inches by Tianyu Lu

Measure Length & Caliper Tool
Editor's Choice
🔧 Utilities
5.0(2 ratings)
FreeAdsIn-App Purchases
Ruler: CM, MM & Inches screenshot 1
Ruler: CM, MM & Inches screenshot 2
Ruler: CM, MM & Inches screenshot 3
Ruler: CM, MM & Inches screenshot 4
Ruler: CM, MM & Inches screenshot 5
Ruler: CM, MM & Inches screenshot 6

This app provides a highly accurate, actual-size ruler that adapts to any screen. It offers dual-edge measurement, a precision caliper mode, and universal calibration for reliable real-world measurements. It functions offline and is designed for various devices.

Ruler - CM, MM, Inches#2

Ruler - CM, MM, Inches by Noadit, Inc.

CM, MM, In. Measure Anything.
Strong Contender
🔧 Utilities
3.5😞(79 ratings)
FreeAds
Ruler - CM, MM, Inches screenshot 1
Ruler - CM, MM, Inches screenshot 2
Ruler - CM, MM, Inches screenshot 3

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

More Mm Ruler Screen apps to explore

FAQ about Mm Ruler Screen

What are the best mm ruler screen apps for iPhone?
Ruler: CM, MM & Inches tops our mm ruler screen apps ranking as of November 2026, with a 5.0-star average from 2 App Store ratings, and it's free to download.
Yes — 19 of the top mm ruler screen apps we rank are free to download, including Ruler: CM, MM & Inches and Ruler - CM, MM, Inches.
Ruler: CM, MM & Inches shows ads and offers in-app purchases, according to its App Store listing as of November 2026.
We track 237+ mm ruler screen apps on the iOS App Store as of November 2026, ranked by rating, recency, and analysis of real user reviews.