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Best Ring Size Calculator App

0+ iOS apps curated and reviewed

4.5 avg rating
18 free apps
Updated June 2026

If you already know Calculator for iPad!, this is the deeper bench. 0+ ring size calculator app for iPhone, all reviewed and ranked by user rating, recency, and download trend as of June 2026.

Compare top Ring Size Calculator App (June 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Calculator for iPad!Calculator for iPad!Free4.7★ (60K)NoNoAug 2026
2Calculator #Calculator #Free4.6★ (36K)YesYesAug 2026
3Calculator·Calculator·Free4.9★ (33K)YesYesAug 2026
4Ring Sizer: Finger Measure AppRing Sizer: Finger Measure AppFree5.0★ (1)NoNoMay 2026
5Ring Sizer・Tape Measure・MetrixRing Sizer・Tape Measure・MetrixFree4.2★ (841)NoYesAug 2026
6Digits Tape CalculatorDigits Tape Calculator$1.994.8★ (1.1K)NoYesAug 2026
7Mila's Ring Sizer & ConverterMila's Ring Sizer & ConverterFree—YesYesJul 2026
8Calculator Pro LiteCalculator Pro LiteFree4.6★ (3K)YesNoAug 2026

Top Picks for Ring Size Calculator App

Calculator for iPad!#1

Calculator for iPad! by 7th Gear

Basic & Scientific Calculator
Editor's Choice
🔧 Utilities
4.7😊(60K ratings)
Free
Calculator for iPad! screenshot 1
Calculator for iPad! screenshot 2
Calculator for iPad! screenshot 3
Calculator for iPad! screenshot 4

This app offers both basic and scientific calculation modes with over 30 scientific operations. It allows for customization of the app's appearance and includes features for note-taking, drawing, and viewing calculation history. It supports high accuracy calculations and nested parentheses.

What We Love

  • 📐 Versatile calculator with basic and scientific modes
  • 📝 Useful note-taking and calculation history features
  • 🎨 Customizable color schemes
  • 💻 Works well on both iPad and iPhone

Room to Improve

  • 💰 Ads can be intrusive in free version
  • 🔒 Lack of transparency around in-app purchases
  • 🔍 Difficulty finding and accessing premium features
Calculator ##2

Calculator # by Incpt.Mobis

Scientific Calculator
Strong Contender
🔧 Utilities
4.6😐(36K ratings)
FreeAdsIn-App Purchases
Calculator # screenshot 1
Calculator # screenshot 2
Calculator # screenshot 3
Calculator # screenshot 4
Calculator # screenshot 5
Calculator # screenshot 6

This multi-function calculator offers basic to advanced scientific and algebraic computations. It includes features like handwriting recognition, equation solvers, and 2D graphing, making it suitable for students and professionals. In-app purchases unlock advanced capabilities.

What We Love

  • 👍 Easy to use
  • 🚀 Powerful functionality
  • 💡 Helpful for math classes
  • ⭐ Great for students

Room to Improve

  • 🔍 Confusing interface after update
  • 📢 Too many intrusive ads
  • 💰 Paywall for advanced features
Calculator·#3

Calculator· by Tim O's Studios, LLC

Big Basic Calculator
Worth Considering
🔧 Utilities
4.9😊(33K ratings)
FreeAdsIn-App Purchases
Calculator· screenshot 1
Calculator· screenshot 2
Calculator· screenshot 3
Calculator· screenshot 4
Calculator· screenshot 5

This app offers a straightforward calculation experience, focusing on essential functions without unnecessary complexity. It includes basic arithmetic, percentage calculations, and advanced functions like square root. Users can customize the appearance with multiple color schemes and utilize features like result copying and split-screen multitasking on iPad.

What We Love

  • 👍 Simple and easy to use
  • 🚀 Quick and responsive
  • 💡 Percentage function works well
  • 👍 Large, clear buttons

Room to Improve

  • 🔋 Frequent ads can be distracting
  • 🐛 Occasional crashes or freezes
  • 🔒 Lack of customization options

More Ring Size Calculator App apps to explore

4
Ring Sizer: Finger Measure App
Ring Sizer: Finger Measure App
Ring Sizer: Finger Measure App
Ring Size Measure Finger Sizer
Free

Easily determine your perfect ring size from home using your phone's screen or camera. Get accurate measurements in seconds and convert between international sizing standards.

Measure finger size on screenMeasure existing ring size on screenAccurate camera measurement
🔧 Utilities
(1)
freemium
5
Ring Sizer・Tape Measure・Metrix
Ring Sizer・Tape Measure・Metrix
Ring Sizer・Tape Measure・Metrix
Digital Measuring & AR Ruler
Free

Transform your smartphone into a precise digital measuring tape. Measure objects, size furniture, and scan rooms in 3D using augmented reality. Supports multiple units and allows saving/sharing measurements.

Real-time object measurementAR room scanningFurniture sizing
🔧 Utilities
(841)
subscription
6
Digits Tape Calculator
Digits Tape Calculator
Digits Tape Calculator
The calculator for humans
$1.99

This app offers a calculator with an editable, line-by-line tape history, combining spreadsheet-like functionality with calculator simplicity. Easily correct mistakes, add comments, and share or print your calculations.

Editable line-by-line tape historyCorrect and insert entriesAdd labels and comments
🔧 Utilities
(1.1K)
free with in-app purchases
7
Mila's Ring Sizer & Converter
Mila's Ring Sizer & Converter
Mila's Ring Sizer & Converter
Jewelry & Wedding Band Fit
Free
🔧 Utilities
(0)
8
Calculator Pro Lite
Calculator Pro Lite
Calculator Pro Lite
Best Calculator
Free

A highly customizable calculator app offering a modern interface and extensive features. Personalize themes, button layouts, and visual elements. Track your calculations with a detailed history and access scientific functions.

Customizable themes and colorsDual-line displayCalculation history
🔧 Utilities
(3K)
ad-supported
9
Ring Sizer: Measuring Tool App
Ring Sizer: Measuring Tool App
Ring Sizer: Measuring Tool App
Measure Your Size: Ruler, Tape
Free

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
🔧 Utilities
(22)
free with in-app purchases
10
The Ring Size App™ by Hitched
The Ring Size App™ by Hitched
The Ring Size App™ by Hitched
by Radius Technologies
Free

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
🌟 Lifestyle
(211)
free with in-app purchases
11
Color Calculator-smart&cute
Color Calculator-smart&cute
Color Calculator-smart&cute
Cute calculator app with theme
Free

This app offers a customizable and fast calculator experience with a wide variety of themes. It includes scientific and standard modes, real-time results, and calculation history. Personalize your math with over 60 cute and colorful themes, including animated options.

60+ free cute and colorful themesExclusive dynamic and special themesScientific & Standard calculator modes
🔧 Utilities
(15K)
freemium
12
Calculator 3.0
Calculator 3.0
Calculator 3.0
Calculations Simplified
Free

A free, redesigned calculator app offering a simpler, more intuitive experience across Apple devices. Features include customizable themes, advanced scientific functions, and unit conversion, all optimized for various screen sizes and interactions.

Customizable themesScientific calculatorUnit converter
🔧 Utilities
(3.5K)
free
13
ClevCalc - Calculator
ClevCalc - Calculator
ClevCalc - Calculator
All-In-One Calculator
Free

This comprehensive calculator app offers a wide range of tools for everyday calculations, from basic arithmetic and scientific functions to unit and currency conversions. It includes specialized calculators for loans, health, fuel costs, GPA, and more, all within a clean and user-friendly interface.

Scientific calculatorUnit converterCurrency converter
📊 Productivity
(13K)
free with in-app purchases
14
Calculator +
Calculator +
Calculator +
Scientific Calc Plus Fraction
Free

This app offers a free basic and scientific calculator with an intuitive interface. It supports fractions, percentages, and advanced editing. Optional upgrades provide specialized calculators for fractions with units, polynomial and linear equation solving, graphing, and geometric shapes.

Free basic and scientific calculatorIntuitive interface with equation and result displayFraction and percent support
🔧 Utilities
(9.6K)
free with in-app purchases
15
Calculator ∞
Calculator ∞
Calculator ∞
The Best Scientific Calculator
$5.99

This advanced calculator app offers a powerful math core and algebra engine for basic to complex calculations. It includes features like step-by-step solutions, handwriting recognition, and 2D graphing, making it suitable for students, engineers, and programmers.

Step-by-step solution hintsMath Photos SolverHandwriting Recognition
📚 Education
(6.3K)
free with in-app purchases
16
PCalc Lite
PCalc Lite
PCalc Lite
The Best Calculator
Free

This free scientific calculator offers essential features like RPN mode, unit conversions, and multiple undo/redo. It provides a taste of a more powerful version, with optional in-app purchases for expanded functionality.

Optional RPN modeMultiple undo and redoUnit conversions and constants
🔧 Utilities
(214)
free with in-app purchases
17
Ring Sizer Tool
Ring Sizer Tool
Ring Sizer Tool
Ring Size & Finger Measure
Free

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
🔧 Utilities
(556)
subscription
18
Ring Sizer - Ring Size Measure
Ring Sizer - Ring Size Measure
Ring Sizer - Ring Size Measure
Ring Sizing Finger Measurement
Free

This app helps you accurately measure your ring size at home. It offers precise measurements in various units and international standards, eliminating guesswork for perfect-fitting jewelry. Ideal for online shoppers, gift-givers, and jewelers.

Accurate ring size measurementsMetric and imperial unitsInternational sizing standards (USA, UK, EU, etc.)
🔧 Utilities
(162)
free with in-app purchases
19
Ring Sizer - Size Measure App
Ring Sizer - Size Measure App
Ring Sizer - Size Measure App
Sizing Measurement Tool
Free

This application helps you accurately measure ring and finger sizes without the need for physical tools. It offers a user-friendly interface and supports various measurement systems for precise results, making online jewelry shopping easier.

Precise finger and ring sizingUser-friendly interfaceSupports multiple measurement systems
🔧 Utilities
(2.4K)
free with in-app purchases
20
Ring Sizer.
Ring Sizer.
Ring Sizer.
Get Your Ring Size Instantly
Free

Easily determine your correct ring size using your smartphone's camera. This app provides accurate measurements for online jewelry purchases or custom designs, eliminating the need for resizing.

Instant ring size determinationCamera-based precise measurementIntuitive and clear instructions
🔧 Utilities
(78)
freemium

FAQ about Ring Size Calculator App

What is the best ring size calculator app for iPhone?
Calculator for iPad! tops our ring size calculator app ranking as of June 2026, with a 4.7-star average from 60K App Store ratings, and it's free to download.
Yes — 18 of the top ring size calculator app we rank are free to download, including Calculator for iPad! and Calculator #.
Calculator for iPad! has no ads and has no in-app purchases, according to its App Store listing as of June 2026.
This app provides both a basic and a scientific calculator for your iPad or iPhone. It allows for complex calculations with over 30 scientific operations, supports high accuracy up to 75 significant digits, and includes features like note-taking and a history of your calculations.
Key features include a choice between basic and scientific modes, over 30 scientific operations, the ability to customize the app's look on iPad, a dedicated tab for notes and drawing, and a history tab to view and edit past calculations. It also supports nested parentheses and high-precision calculations.