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Best Device Size App

210+ iOS apps curated and reviewed

4.4 avg rating
18 free apps
Updated June 2026

Looking for free device size app apps? 18 of our 210+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Top Picks for Device Size App

Ring Sizer - Size Measure App#1

Ring Sizer - Size Measure App by LightApps OU

Sizing Measurement Tool
Editor's Choice
🔧 Utilities
4.2😞(2.1K ratings)
FreeAdsIn-App Purchases
Ring Sizer - Size Measure App screenshot 1
Ring Sizer - Size Measure App screenshot 2
Ring Sizer - Size Measure App screenshot 3
Ring Sizer - Size Measure App screenshot 4
Ring Sizer - Size Measure App screenshot 5
Ring Sizer - Size Measure App screenshot 6

A convenient ring sizing app that accurately measures your finger for the perfect ring fit. Suitable for both casual users and professionals, with support for different measurement systems and compatibility with various devices including Apple Watch. Download now for precise measurements without the guesswork.

What We Love

  • ⭐️ Accurate measurements
  • 👍 Easy to use
  • 🚀 Convenient ring sizer
  • 🔍 Helpful for online purchases

Room to Improve

  • 🔒 Difficult to cancel subscription
  • 💰 Paid subscription required
  • 🐛 Inconsistent sizing results
Ring Sizer - Ring Size Measure#2

Ring Sizer - Ring Size Measure by Vipul Prajapati

Ring Sizing Finger Measurement
Strong Contender
🔧 Utilities
4.6(162 ratings)
FreeIn-App Purchases
Ring Sizer - Ring Size Measure screenshot 1
Ring Sizer - Ring Size Measure screenshot 2
Ring Sizer - Ring Size Measure screenshot 3
Ring Sizer - Ring Size Measure screenshot 4

Get a perfect fit every time with our ring sizer app, offering accurate measurements in metric and imperial units, with visual guides and support for global sizing standards. Download now and find your ideal ring size with ease.

Tape Measure®#3

Tape Measure® by AI Photo Editor Lab SRL

Measurement App for iPhone
Worth Considering
🔧 Utilities
4.6😊(42K ratings)
FreeAdsIn-App Purchases
Tape Measure® screenshot 1
Tape Measure® screenshot 2
Tape Measure® screenshot 3
Tape Measure® screenshot 4
Tape Measure® screenshot 5

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.

What We Love

  • 🚀 Useful and intuitive features
  • 👍 Easy to use
  • 🎉 Fun and engaging
  • 💡 Variety of measurement tools

Room to Improve

  • 🐛 Unreliable and inaccurate measurements
  • 🤯 Confusing and difficult to use
  • 🔍 Limited functionality

More Device Size App apps to explore

4
My Device ID by AppsFlyer
My Device ID by AppsFlyer
My Device ID by AppsFlyer
Whitelist Test Device
Free

This application allows users to easily view and share their device ID, including IDFA and IDFV, and whitelist their device as a test device in their account. By whitelisting a test device, users can ensure seamless testing of their integration with a leading mobile attribution and marketing analytics platform.

🔧 Utilities
(41)
5
Device Settings
Device Settings
Device Settings
by Yalintech
Free

Enhance your iOS experience with an app that provides comprehensive control over your device settings. Manage and customize your iOS device with features like data usage, Wi-Fi management, storage optimization, and advanced CPU monitoring. Download now for unparalleled control and functionality!

📊 Productivity
(620)
6
The Ring Size App™ by Hitched
The Ring Size App™ by Hitched
The Ring Size App™ by Hitched
by Radius Technologies
Free

Discover an effortless way to find your ring size with a free and user-friendly app. Say goodbye to traditional sizing methods - download now to get your ring size in minutes!

🌟 Lifestyle
(211)
7
Ruler, Measuring Tape - AR App
Ruler, Measuring Tape - AR App
Ruler, Measuring Tape - AR App
Length Measure Calculator Tool
Free

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!

🔧 Utilities
(995)
8
Ring Sizer & Tape Measure App
Ring Sizer & Tape Measure App
Ring Sizer & Tape Measure App
Ring Size - Ruler Inches & mm
Free

This application helps users measure their ring sizes accurately by providing a virtual tool for trying on different ring sizes and styles. Find your perfect fit hassle-free with just a few taps!

🔧 Utilities
(75)
9
Ring Sizer - Measure Ring Size
Ring Sizer - Measure Ring Size
Ring Sizer - Measure Ring Size
Accurate Ring Sizer Finger App
Free

This ring sizing app helps you accurately measure your ring size using your iPhone's camera, providing precise measurements and supporting various units and international standards. Download the app to easily determine your ring size, save it for future reference, and share it with others, making it perfect for personal use or for jewelers and retailers.

🔧 Utilities
(54)
10
Penometer
Penometer
Penometer
Track & Compare Your Size
Free

Track your penis size measurements over time, compare them to global and national averages, and identify if you have a micropenis. Download the app to take control of your health, unlock advanced features with a premium subscription, and enjoy secure and private data storage.

💪 Health & Fitness
(34)
11
Device Monitor²
Device Monitor²
Device Monitor²
System activity info
Free

Discover vital system activity info with this app optimized for Apple devices, offering detailed insights into sensors, RAM, storage, CPU, network, battery, display, and more. Customize widgets and enjoy additional features with in-app purchases for an enhanced experience.

🛠️ Developer Tools
(9K)
12
Measurement app for iPhone
Measurement app for iPhone
Measurement app for iPhone
Measurement App for iPhone
Free

This measurement app uses augmented reality technology to help you measure objects and distances with your phone's camera, providing accurate results in various units. With features like tape measure, area tool, and ruler, you can easily measure anything, from small objects to large spaces, and save your measurements for future reference.

🔧 Utilities
(110)
13
Ring Sizer Tool
Ring Sizer Tool
Ring Sizer Tool
Ring Size & Finger Measure
Free

This application helps you accurately determine your ring size with just a few simple steps, ensuring a perfect fit every time. Say goodbye to guessing and ensure your next ring purchase is just right!

🔧 Utilities
(556)
14
My Measures PRO + AR Measure
My Measures PRO + AR Measure
My Measures PRO + AR Measure
Store & Share Measurements
$11.99

Measure anything with precision using augmented reality technology with My Measures PRO app. Easily store and manage all your measurements in one place for quick reference and sharing. Experience accurate measuring like never before – download now!

📊 Productivity
(3.3K)
15
Loupe: What Apps Can See
Loupe: What Apps Can See
Loupe: What Apps Can See
Privacy & Security Guide
Free
🛠️ Developer Tools
(0)
16
Photo Measures
Photo Measures
Photo Measures
Measure, save and share
$6.99

Capture, save, and share measurements on your photos easily with this app. Whether for home projects or professional use, this tool helps you streamline planning and collaborate efficiently. Try it now!

📊 Productivity
(505)
17
Ring Sizer.
Ring Sizer.
Ring Sizer.
Get Your Ring Size Instantly
Free

Discover your perfect ring size instantly with an intuitive app utilizing your smartphone's camera for accurate measurements. Say goodbye to resizing hassles and always choose the right size for your rings. Unlock premium features for a seamless experience. Privacy Policy:first link, Terms of Use:second link.

🔧 Utilities
(78)
18
App Lock - Invis AppBlock
App Lock - Invis AppBlock
App Lock - Invis AppBlock
Screen Time & Privacy Safety
Free
$2.99 | 100% OFF

Enhance focus and manage screen time with an app that blocks distracting or inappropriate apps. Automate app control through time-based shortcuts and easily manage app access with a simple click or desktop widgets.

🔧 Utilities
(224)
19
Deviapp - Device Diagnostics
Deviapp - Device Diagnostics
Deviapp - Device Diagnostics
Diagnostics and Safety
Free

Discover everything about your device with Deviapp, from software and memory details to battery and display diagnostics. Block phishing sites easily for safe browsing in Safari and protect your data. Try our advanced services with a 3-day free trial to block ads and phishing sites. Ensure your safety and privacy today!

📊 Productivity
(480)
20
Measure Tool - Measuring Tape
Measure Tool - Measuring Tape
Measure Tool - Measuring Tape
Ruler App, Mobile Meter
Free

Measure Tool is your go-to mobile app for all your measuring needs. Simply point your phone's camera at an object to instantly get precise measurements in both imperial and metric units. Whether you're shopping, doing DIY projects, or simply satisfying your curiosity, this AI ruler app has you covered. Download now for a cutting-edge measuring experience!

🔧 Utilities
(313)

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