Best Ring Size Calculator Apps

243+ iOS apps curated and reviewed

3.0 avg rating

20 free apps

Updated October 2026

Every iPhone needs a few good ring size calculator apps. We benchmark 243+ 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 Ring Size Calculator Apps (October 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	Ring Size Measurer	Free	—	No	No	May 2026
2	Ring Size Calcluator	Free	1.0★ (1)	No	No	May 2026
3	Ring Sizer : Finger Size	Free	—	Yes	Yes	Oct 2026
4	RingDot - Ring Sizer	Free	—	No	No	Oct 2026
5	Ring Sizer Tool	Free	4.7★ (614)	No	Yes	Oct 2026
6	Mila's Ring Sizer & Converter	Free	—	Yes	Yes	Oct 2026
7	Ring Sizer - Your ring size!	Free	—	No	Yes	Aug 2026
8	The Ring Size App™ by Hitched	Free	2.1★ (211)	Yes	No	May 2026

Top Picks for Ring Size Calculator

#1

Ring Size Measurer by Zorbey Torunoglu

Measure your ring size.

Editor's Choice

0.0(0 ratings)

Free

Ring Size Measurer screenshot 1

Ring Size Measurer screenshot 2

Ring Size Measurer screenshot 3

Ring Size Measurer screenshot 4

Ring Size Measurer screenshot 5

Ring Size Measurer screenshot 6

#2

Ring Size Calcluator by Nuox technologies

Strong Contender

1.0(1 ratings)

Free

Ring Size Calcluator screenshot 1

Ring Size Calcluator screenshot 2

Ring Size Calcluator screenshot 3

Ring Size Calcluator screenshot 4

Ring Size Calcluator screenshot 5

Ring Size Calcluator screenshot 6

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.

#3

Ring Sizer : Finger Size by Mastertex Fab

Ring Size & Finger Measure

Worth Considering

📊 Productivity

0.0(0 ratings)

FreeAdsIn-App Purchases

Ring Sizer : Finger Size screenshot 1

Ring Sizer : Finger Size screenshot 2

Ring Sizer : Finger Size screenshot 3

Ring Sizer : Finger Size screenshot 4

Ring Sizer : Finger Size screenshot 5

Ring Sizer : Finger Size screenshot 6

More Ring Size Calculator apps to explore

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

Ring Sizer Tool

Ring Sizer Tool

Ring Sizer Tool

Ring Size & Finger Measure

Accurately measure your finger size or compare existing rings to find the perfect fit. This tool simplifies ring sizing for confident online purchases and jewelry selection.

Finger measurement without a ringRing comparison for sizingIntuitive and simple interface

Mila's Ring Sizer & Converter

Mila's Ring Sizer & Converter

Mila's Ring Sizer & Converter

Jewelry & Wedding Band Fit

Ring Sizer - Your ring size!

Ring Sizer - Your ring size!

Ring Sizer - Your ring size!

Your size at your fingertip

The Ring Size App™ by Hitched

The Ring Size App™ by Hitched

The Ring Size App™ by Hitched

by Radius Technologies

Easily determine your ring size from the comfort of your home. This app eliminates the need for physical charts or store visits, providing quick and accurate sizing in minutes.

Determine ring size at homeQuick and easy to useAccurate sizing

free with in-app purchases

American Ring Size

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

Ring Sizer – Ring Size Meter

Ring Sizer – Ring Size Meter

Ring Sizer – Ring Size Meter

Ring Sizing Measurement Tool

Easily measure jewelry ring sizes using your phone's screen. Simply place your ring on the screen and adjust the slider to match its inner edge. The app provides accurate sizing in multiple international measurement systems.

Measure ring size by diameter or circumferenceSupport for metric and imperial unitsMultiple international sizing systems

free with in-app purchases

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

Ring Sizer & Size Measure

Ring Sizer & Size Measure

Ring Sizer & Size Measure

Measure Your Ring Size Fast

SetRing - Ring Sizer

SetRing - Ring Sizer

SetRing - Ring Sizer

The Ultimate Ring Sizer App.

Easily measure your ring size accurately from home using your phone. Supports multiple international sizing standards and offers helpful tips for jewelry care. Perfect for online shopping or buying gifts.

Accurate and instant ring size measurementEasy-to-use interfaceMultiple international sizing standards

Ring Sizer: Finger Measurement

Ring Sizer: Finger Measurement

Ring Sizer: Finger Measurement

Measure your finger ring size

Ring Sizer : Ring size measure

Ring Sizer : Ring size measure

Ring Sizer : Ring size measure

Ring measurement tool

Easily and accurately measure your ring size using your smartphone. Ideal for online jewelry purchases or verifying existing ring dimensions. Offers multiple sizing systems and a clean interface.

On-screen guide for measurementSupports EU, US, UK, JP sizingFine-tune for accuracy

Ring Sizer for Japan

Ring Sizer for Japan

Ring Sizer for Japan

Japanese ring sizes,1 to 30

Ring Sizer – Size Measure app

Ring Sizer – Size Measure app

Ring Sizer – Size Measure app

Get Your Ring Size Instantly

Jostens Ring Sizer

Jostens Ring Sizer

Jostens Ring Sizer

by Radius Technologies

Easily determine your accurate ring size for any finger with this intuitive application. It provides precise measurements down to 1/8 sizes and offers convenient conversion to international sizing standards.

Accurate ring size measurementMeasures down to 1/8 sizesWorks on any finger

🛍️ Shopping

International Ring Sizer

International Ring Sizer

International Ring Sizer

Discover Your Ring Size

Measure your ring size accurately using an existing ring. This utility helps you find the perfect fit without needing a physical sizer. Ideal for online jewelry purchases.

Measure ring size with existing ringsAccurate sizing for online purchasesSimple and intuitive interface

SizeMyRing: Ring Sizer

SizeMyRing: Ring Sizer

SizeMyRing: Ring Sizer

Measure finger size, converter

FAQ about Ring Size Calculator

Are there free ring size calculator apps for iPhone?

Yes — 20 of the top ring size calculator apps we rank are free to download, including Ring Size Measurer and Ring Size Calcluator.

Does Ring Size Measurer have ads or in-app purchases?

Ring Size Measurer has no ads and has no in-app purchases, according to its App Store listing as of October 2026.

How many ring size calculator apps are on the App Store?

We track 243+ ring size calculator apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.