Best Ring Sensor Apps

250+ iOS apps curated and reviewed

2.8 avg rating

18 free apps

Updated September 2026

If you already know Ring, this is the deeper bench. 250+ ring sensor apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of September 2026.

Compare top Ring Sensor Apps (September 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	Ring - Always Home	Free	4.7★ (1.8M)	No	No	Sep 2026
2	Ring Size Measurer	Free	—	No	No	May 2026
3	Ring Sizer for Japan	Free	—	Yes	Yes	May 2026
4	Libre Light Sensor	Free	4.8★ (113)	No	No	Sep 2026
5	Ring Sizer : Finger Size	Free	—	Yes	Yes	Sep 2026
6	RingDot - Ring Sizer	Free	—	No	No	Jul 2026
7	Proteus Sensor Cloud	Free	—	Yes	No	May 2026
8	osaring sizer	Free	—	No	No	Aug 2026

Top Picks for Ring Sensor

#1

Ring - Always Home by Ring.com

Editor's Choice

4.7😐(1.8M ratings)

Free

#4in Lifestyle

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Monitor your home remotely with video doorbells, security cameras, and alarm systems. Receive instant alerts for visitors and motion, view live HD video, and communicate with guests. Smart lights and alarm systems offer further control and safety features.

What We Love

🚀 Excellent video quality
🔒 Helpful security features
👍 Easy to set up and use
🔋 Good battery life

Room to Improve

🐛 Frequent connectivity issues
🕰️ Slow live view response times
💰 Expensive subscription fees
📽️ Poor video quality at night

#2

Ring Size Measurer by Zorbey Torunoglu

Measure your ring size.

Strong Contender

0.0(0 ratings)

Free

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#3

Ring Sizer for Japan by mitsunori oishi

Japanese ring sizes,1 to 30

Worth Considering

0.0(0 ratings)

FreeAdsIn-App Purchases

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More Ring Sensor apps to explore

Libre Light Sensor

Libre Light Sensor

Libre Light Sensor

Measure Light in Lux

Measure ambient light levels in Lux using your iPhone's camera. Optimize sleep quality by understanding light exposure throughout the day and night.

Measure light in LuxUtilizes iPhone cameraOptimize sleep quality

Ring Sizer : Finger Size

Ring Sizer : Finger Size

Ring Sizer : Finger Size

Ring Size & Finger Measure

📊 Productivity

RingDot - Ring Sizer

RingDot - Ring Sizer

RingDot - Ring Sizer

Measure your ring size accurately by placing a ring on your screen and adjusting a dot to match its inner diameter. Get your size in seconds without needing a physical sizer.

Place ring on screenAdjust dot to fitFind size in seconds

Proteus Sensor Cloud

Proteus Sensor Cloud

Proteus Sensor Cloud

by Avarachan Cherian

Jewellery ring size finder

Easily determine your jewelry ring size with this accurate tool. It offers multiple measurement units, visual guides, and supports numerous international sizing systems. Share your findings effortlessly.

Metric and imperial unitsDiameter or circumference measurementVisual guides for precision

Cam Uptime Alerts

Cam Uptime Alerts

Cam Uptime Alerts

Offline alerts for Ring cams

Ring Sizer - Perfect Moments

Ring Sizer - Perfect Moments

Ring Sizer - Perfect Moments

Get your perfect ring fit!

Ring Sizer: Measuring Tool App

Ring Sizer: Measuring Tool App

Ring Sizer: Measuring Tool App

Measure Your Size: Ruler, Tape

Easily determine your precise ring size with this user-friendly tool. Avoid guesswork and ensure a perfect fit for your next ring purchase, whether for yourself or a gift. It simplifies the sizing process for accurate results.

Effortless ring size gaugingGuarantees a flawless fitUser-friendly experience

free with in-app purchases

This application connects to smart rings to display and analyze your daily exercise and sleep data. It helps you understand your health status by providing visual insights into your activity levels and sleep patterns.

Exercise data display (steps, calories, duration)Sleep data display (deep sleep, light sleep, sleep time)Visual data analysis

💪 Health & Fitness

Ring Sizer - Your ring size!

Ring Sizer - Your ring size!

Ring Sizer - Your ring size!

Your size at your fingertip

Ring Size Calcluator

Ring Size Calcluator

Ring Size Calcluator

by Nuox technologies

Easily determine your ring size at home. This utility app allows you to measure your finger using common household items like credit cards or coins. Get accurate measurements for your jewelry purchases.

Measure ring sizeUse debit/credit card for measurementUse coins for measurement

PerfectFit® Ring Sizer

PerfectFit® Ring Sizer

PerfectFit® Ring Sizer

Find ring or finger size

Accurately measure your ring size for any finger using advanced technology. This app eliminates the need for manual fittings and seamlessly integrates with online jewelry stores, solving sizing issues for e-commerce.

Accurate to 1/8 sizesWorks on any mobile deviceInternational sizing conversion

Interact with Sensor Globes

Your Smart Companion

American Ring Size

$0.99 | 100% OFF

Accurately measure ring sizes using your phone's screen. Determine diameter, circumference, and convert between international sizing systems. Ideal for jewelers and shoppers needing precise measurements.

Measure ring diameter on screenDetermine circumference in mm/inchesPacher method calculation

FAQ about Ring Sensor

What are the best ring sensor apps for iPhone?

Ring - Always Home tops our ring sensor apps ranking as of September 2026, with a 4.7-star average from 1.8M App Store ratings, and it's free to download.

Are there free ring sensor apps for iPhone?

Yes — 18 of the top ring sensor apps we rank are free to download, including Ring - Always Home and Ring Size Measurer.

Does Ring - Always Home have ads or in-app purchases?

Ring - Always Home has no ads and has no in-app purchases, according to its App Store listing as of September 2026.

How many ring sensor apps are on the App Store?

We track 250+ ring sensor apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.

What does the Ring app do?

The Ring app allows you to monitor your home remotely using Ring devices like video doorbells, security cameras, and alarm systems. You can receive instant alerts for motion or visitors, view live HD video, and communicate with people at your door.

What are the key features of the Ring app?

Key features include real-time doorbell and motion alerts, live HD video streaming, Two-Way Talk to speak with visitors, control over Ring Smart Lights, and monitoring of Ring Alarm sensors. Optional professional monitoring is also available.