194+ iOS apps curated and reviewed
The best mm ruler apps on iPhone average 4.2★ across 194+ titles — we've ranked them by what real users actually keep on their phones. Updated May 2026.
Measure length conveniently anytime and anywhere with this screen ruler application, offering various ruler classifications, custom sizing, screen lock, screenshot capture, child mode, and easy contact options for support. Explore the versatility of length measurements on your phone with Ruler ME!
A high-precision ruler app for iPhone and iPad featuring accurate measurement in inches, mm, and cm. Save measurements as photos, select from three ruler colors, and easily toggle between different units. Enjoy precise measurements with the ability to save results to your device's Camera Roll.
A convenient tool for measuring objects using your phone's camera. Simply snap a photo and use the app to measure the dimensions of objects. Try it out now for easy and accurate measurements!
Measure anything with your iPhone using this versatile measurement app. Features include tape measure, laser level, stud finder, measurement history, and more. Experience augmented reality tools on devices compatible with ARKit and A9 processor or later.
An augmented reality measuring tool that offers precise measurements in inches or centimeters with automatic device adaptation, endless scrolling, and easy touch-screen functionality. Measure lengths and distances accurately for free with this flexible and limitless ruler app!
This simple and accurate tool helps you quickly size your jewelry ring and other items using unique visual cues and various measurement systems. Download the app to measure objects with an accurate ruler or your phone camera, and get precise results in no time.
A powerful AR tape measure tool that uses augmented reality technology to measure real-world objects with your smartphone's camera. Features include measuring linear sizes, distances, angles, area, volume, and height accurately. Try our Premium subscription for ad-free experience and unlimited projects. [Call-to-action: Experience precise measurements with AR technology today!]
Experience a revolutionary way to measure with your iPhone using Ruler AR - Tape Measure. Utilizing Apple ARKit and augmented reality, get precise dimensions of objects using your phone's camera. Features include measuring distance, length, height, area, and angles, with the option to save measurements with ease. For premium functionality and ad removal, consider the Premium Membership Weekly subscription.
Access a powerful toolkit through augmented reality, including features like Tape Measure, Ruler, Height Tool, and more. Join over 5,000,000 users already benefiting from precise measurements for various tasks.
Turn your device into a precise measuring tool with this digital ruler app, perfect for quick measurements at home or work. Measure objects using your screen or camera, switch between units, and save previous measurements with this user-friendly app.
This application allows users to measure real-world objects accurately using their iPhone, with measurements displayed in both millimeters and inches. It's a simple yet useful tool that can be used to measure objects of all sizes.
A portable measuring tool app that provides a range of features including a ruler, protractor, plumb line, spirit level, altimeter, air pressure and location meter, decibel meter, and ordinal date converter, allowing you to measure and calculate various parameters with your phone. Download it now to have a versatile measuring tool always at your fingertips.
Measure anything with a handy digital ruler and create sketches with text editing options using this smart electronic measuring tool app. Features include imperial and metric units, rangefinder, sketch mode, and sharing capabilities. Subscription unlocks additional features like the Area Tool, Undo, Flashlight, and Magnet.
Easily measure lengths in both inches and centimeters with this convenient application. Simply download now to streamline your measuring needs.
This measurement tool uses your device's touchscreen as a ruler or tape measure, allowing you to make quick measurements, calculate areas and ratios, and split objects into equal parts. With various features and units, you can easily measure small objects and utilize it in different areas for tasks such as measuring jewelry, screws, or knitting patterns.
Turn your phone into a versatile toolkit with a comprehensive set of measuring instruments, allowing you to measure length, height, area, and create floor plans with ease. This handy application offers a range of tools, including a smart ruler, height measurement, area calculator, floor plan creator, screen ruler, and level tool, making it perfect for everyday tasks, home projects, and professional use.
Turn your mobile device into a precise measuring tool that's always with you, and easily measure various lengths with confidence using a clean and intuitive interface. Download now and start measuring like a pro with features like dual units, precision calibration, and haptic feedback!
Measure height, length, square, angle and more with your camera using augmented reality technology. Download now and get the right measurement every time with features like point and shoot, air mode, and surface locked.