Ruler

Contains ads
116K reviews
Content rating
Rated for 3+
10M+
Downloads
Content rating
Rated for 3+
Learn more
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About this app

Measure anything with your phone easily and accurately.

Ruler App turns your smartphone into a simple and reliable measurement tool. Use it at home, at work, or for school. Quickly measure objects, lines, and angles with ease.

Features:

📏 Digital ruler and tape measure – measure length and size directly on your screen
📱 Screen ruler – convenient for quick measurements
🔢 Unit converter – switch between inches, centimeters, and millimeters
📐 Measure objects and lines – check distance, width, or diameter
⚙️ Caliper mode – precise measurements for small objects
📊 Protractor – measure angles up to 360°
🛠 Multiple modes – point, line, level, and screen measurement

Benefits:

✅ Fast and accurate results
✅ Easy to calibrate and use
✅ Clear, simple interface
✅ Useful for DIY projects, school, office, and everyday tasks

This all-in-one measurement app helps you measure length, distance, and angles whenever you need. Keep a digital ruler and tape measure always in your pocket.
Digital ruler, tape measure: app measure length, objects, and angles easily
Updated on
Oct 26, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    App activity, App info and performance, and Device or other IDs
  • This app may collect these data types
    App activity, App info and performance, and Device or other IDs
  • Data is encrypted in transit
  • Data can’t be deleted

Ratings and reviews

113K reviews
Ross Baldwin
October 31, 2026
Non-GDPR compliant. I'm not going to wade through hundreds of vendors turning off legitimate interest separately for each one. Promptly uninstalled. (and in case the developer replies saying it's "standard", it may well be but it's still NOT gdpr compliant. Cookie consent MUST NOT be more difficult to reject non-essential cookies than to accept them, and they MUST NOT be enabled by default. Other websites and apps can do it correctly, so you can too. Fix that and I'll reinstall the app 🙂)
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Jasper Nadar
September 5, 2026
Effective, no-nonsense app that does what it's supposed to. Has limited ads with short duration. Should have had a feature that restricts screen occupancy without affecting scaling.
5 people found this review helpful
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Dany
October 21, 2026
Great and excellent tool for measurement of things that you might encounter in our daily life.. Such as getting the circumference of a circle without a caliper around, can be use as a protractor when you need one and so on... What a great tool to have in your smartphone! Easy to convert imperial to metric just in one click. I Highly recommended this app!
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What’s new

Fixed bugs. Added new features.