Best Ruler App Mm

235+ iOS apps curated and reviewed

4.1 avg rating
20 free apps
Updated October 2026

Every iPhone needs a few good ruler app mm. We benchmark 235+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Compare top Ruler App Mm (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Ruler - CM, MM, InchesRuler - CM, MM, InchesFree3.5★ (79)YesNoNov 2026
2Ruler 2.0 - inch, mm, cmRuler 2.0 - inch, mm, cmFree3.9★ (205)NoNoOct 2026
3Ruler®Ruler®Free4.3★ (35K)NoYesNov 2026
4Ruler: CM, MM & InchesRuler: CM, MM & InchesFree5.0★ (2)YesYesOct 2026
5Tape Measure™Tape Measure™Free4.4★ (90K)NoYesNov 2026
6RulerAppRulerAppFree——NoSep 2026
7Ruler - مسطرةRuler - مسطرةFree——NoJul 2026
8Ruler ++Ruler ++Free3.5★ (951)NoYesNov 2026

Top Picks for Ruler App Mm

Ruler - CM, MM, Inches#1

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

CM, MM, In. Measure Anything.
Editor's Choice
🔧 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
Ruler 2.0 - inch, mm, cm#2

Ruler 2.0 - inch, mm, cm by Oleg Osipov

High measurement accuracy
Strong Contender
🔧 Utilities
3.9😞(205 ratings)
Free
Ruler 2.0 - inch, mm, cm screenshot 1
Ruler 2.0 - inch, mm, cm screenshot 2
Ruler 2.0 - inch, mm, cm screenshot 3
Ruler 2.0 - inch, mm, cm screenshot 4
Ruler 2.0 - inch, mm, cm screenshot 5

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.

What We Love

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

Room to Improve

  • 🐛 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
Ruler®#3

Ruler® by Tue Nguyen Minh

+ Photo Ruler & AR Measure
Worth Considering
🔧 Utilities
4.3😞(35K ratings)
FreeIn-App Purchases
Ruler® screenshot 1
Ruler® screenshot 2
Ruler® screenshot 3
Ruler® screenshot 4

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 Ruler App Mm apps to explore

FAQ about Ruler App Mm

What is the best ruler app mm for iPhone?
Ruler - CM, MM, Inches tops our ruler app mm ranking as of October 2026, with a 3.5-star average from 79 App Store ratings, and it's free to download.
Yes — 20 of the top ruler app mm we rank are free to download, including Ruler - CM, MM, Inches and Ruler 2.0 - inch, mm, cm.
Ruler - CM, MM, Inches shows ads and has no in-app purchases, according to its App Store listing as of October 2026.
We track 235+ ruler app mm on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.