# Ring Sizer & Finger Measure — Engagement Wedding Band Gauge > iPhone-based ring sizing tool with device calibration and international size conversion. (iPhone/iPad app by LEAN ASIA CO., LTD.) - Source: https://appshunter.io/ios/app/ring-sizer-and-finger-measure/id6752258147 (this page in markdown: same URL + `.md`) - Developer: [LEAN ASIA CO., LTD](https://appshunter.io/developer/1815050814) - Category: Utilities, Lifestyle - Price: Free with in-app purchases - Rating: 1.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 16.0 · 16 MB - Languages: American English - Released: 2025-09-09 - Data updated: 2026-08-23 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/ring-sizer-and-finger-measure/id6752258147/reviews.md ## What is Ring Sizer & Finger Measure? Find your perfect ring size in seconds with the most accurate ring measurement app for engagement rings, wedding bands, and online jewelry shopping. Designed to eliminate guesswork when buying engagement rings, wedding bands, or jewelry gifts, this app turns your iPhone into a professional ring sizing tool with device-specific calibration for millimeter-perfect accuracy. The ideal solution for surprise proposals, gift shopping, and online jewelry purchases. Whether you measure an existing ring, size your finger directly, or convert between international standards, every measurement is reliable and confident. — KEY FEATURES — • Device-Calibrated Accuracy: Detects your exact iPhone model and applies the correct PPI (pixels per inch) for true-to-life measurements. From 326 PPI on iPhone SE to 460 PPI on iPhone 15 Pro Max, when a 17mm circle is shown, it really measures 17mm on screen. Jeweler-level precision in your pocket. • Two Measurement Methods: Place an existing ring on your screen and match the inner diameter to the on-screen circle, or measure your finger directly using the visual hand guide with precision crosshairs. Perfect for secret proposal planning or when you have no ring to reference. • 6 International Size Standards: Instantly converts between US/Canada (3-13), UK/Australia (F-Z), EU/ISO (44-70), Japan/China (4-30), millimeters (14.0-22.3mm), and inches (0.55-0.88 in). Shop confidently on Etsy, Amazon, Blue Nile, Brilliant Earth, or any global jewelry marketplace. • Save Multiple Ring Sizes: Build a personal collection organized by hand (left/right) and finger (thumb, index, middle, ring, pinky). Add custom titles per entry. Perfect for family gift sizes, jewelry professional client records, or shopping for multiple ring styles. • Complete Conversion Table: A reference guide showing all 27 ring sizes across every international standard in one scrollable table. Compare standards instantly and verify measurements before purchase. • Fine-Tune Controls: Plus/minus adjustment buttons allow 0.3mm incremental changes for exact sizing. Animated ring circle and tick marks ensure confident measurements. Works completely offline — measure anytime, anywhere. — PERFECT FOR EVERY SITUATION — • Surprise Proposals: Measure your partner's existing ring while they sleep, or discreetly size one of their rings when they are away. Silent measurement with no screenshots or notifications keeps the surprise safe. • Gift Shopping: Buying rings for birthdays, anniversaries, Christmas, or Valentine's Day becomes stress-free. Save sizes for every family member and friend. Never guess sizes when shopping online or in store. • Jewelry Professionals: Jewelers, ring designers, and store staff use this app for quick consultations, custom order sizing, and client education. Save unlimited client measurements with custom labels. • Online Jewelry Shoppers: Shop international jewelry websites without sizing anxiety. The conversion system handles every global standard. Preview your exact ring size visually on screen before purchasing. Prevent expensive returns. — PREMIUM — Unlock unlimited potential with Premium. Save unlimited measurements for every finger and every person. Enjoy an ad-free measuring experience. Access priority customer support. Get first access to future measurement tools. — LEGAL — Terms of Use: https://leanstudio.asia/terms-of-use Privacy Policy: https://leanstudio.asia/privacy-policy — SUPPORT — Questions, feedback, or feature requests? Contact support@leanstudio.asia. We value your suggestions to keep improving the app. — GET STARTED — Combine device-calibrated accuracy, dual measurement methods, and international size conversion in one simple app. No more guessing ring sizes or costly jewelry mistakes — just measure, convert, and shop with confidence. Download today and turn your iPhone into a professional ring sizing tool. Perfect for engagement ring shopping, wedding bands, and jewelry gifts. ## Key features - Device-calibrated accuracy - Measure existing rings or finger directly - Convert between 6 international size standards - Save multiple ring sizes - Complete international conversion table - Fine-tune controls with incremental adjustments - Offline functionality ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Premium Yearly | $24.99 | per year | | Premium Monthly | $19.99 | per month | | Premium Yearly | $24.99 | per year | | Weekly | $4.99 | per 7 days | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Lifetime | $49.99 | one-time | | Lifetime | $49.99 | one-time | | Lifetime | $49.99 | one-time | ## Frequently asked questions about Ring Sizer & Finger Measure ### How accurate is Ring Sizer & Finger Measure? The app offers device-calibrated accuracy, applying specific PPI settings for your iPhone model to ensure millimeter-perfect measurements. For example, it adjusts for differences between an iPhone SE (326 PPI) and an iPhone 15 Pro Max (460 PPI) to ensure a displayed 17mm circle truly measures 17mm on screen. ### What measurement methods does Ring Sizer & Finger Measure offer? You can measure an existing ring by placing it on your screen and matching its inner diameter to an on-screen circle, or you can measure your finger directly using a visual guide with precision crosshairs. ### What international ring size standards does Ring Sizer & Finger Measure support? It instantly converts between US/Canada (3-13), UK/Australia (F-Z), EU/ISO (44-70), Japan/China (4-30), millimeters (14.0-22.3mm), and inches (0.55-0.88 in). ### Can I save ring sizes for different people with Ring Sizer & Finger Measure? Yes, you can build a personal collection of ring sizes organized by hand and finger, adding custom titles for each entry. This is ideal for tracking family gift sizes or client records. ### Does Ring Sizer & Finger Measure work offline? Yes, the app works completely offline, allowing you to measure ring sizes anytime and anywhere without needing an internet connection. ### What are the subscription options for Ring Sizer & Finger Measure? Subscription plans include Weekly ($4.99/P7D), Premium Monthly ($19.99/P1M), and Premium Yearly ($24.99/P1Y). The Premium Yearly plan offers a 3-day free trial. ### Does Ring Sizer & Finger Measure have ads? Yes, this app contains advertisements. ### How does Ring Sizer & Finger Measure compare to other ring sizing apps? Its key differentiator is device-specific calibration for enhanced accuracy, along with a comprehensive set of international size conversions and the ability to save multiple ring sizes for different fingers and people. ## Version history (last 5 releases) ### 1.0.8 — 2026-05-31 What's New NEW FEATURES: • Enhanced finger measurement accuracy • Improved conversion table with better readability • Bug fixes and performance improvements PERFECT FOR: • Engagement ring shopping season • Holiday gift buying • Quick professional measurements Love the app? Leave us a review! Need help? Contact support@leanstudio.asia ### 1.0.7 — 2026-05-08 What's New NEW FEATURES: • Enhanced finger measurement accuracy • Improved conversion table with better readability • Bug fixes and performance improvements PERFECT FOR: • Engagement ring shopping season • Holiday gift buying • Quick professional measurements Love the app? Leave us a review! Need help? Contact support@leanstudio.asia ### 1.0.6 — 2026-01-14 This version focuses on internal performance optimizations and stability ### 1.0.5 — 2025-12-23 Hey there! We've just released a new update — it's smoother, smarter, and better than ever. Enjoying the app? We’d truly appreciate a 5-star rating on the store. Your support helps us grow and improve. Have feedback or need assistance? Feel free to contact us anytime at: support@leanstudio.asia Thank you for your continued support and for being a part of our journey. — LEAN ASIA ### 1.0.4 — 2025-11-20 Hey there! We've just released a new update — it's smoother, smarter, and better than ever. Enjoying the app? We’d truly appreciate a 5-star rating on the store. Your support helps us grow and improve. Have feedback or need assistance? Feel free to contact us anytime at: support@leanstudio.asia Thank you for your continued support and for being a part of our journey. — LEAN ASIA ## Apps similar to Ring Sizer & Finger Measure | App | Rating | Price | Category | | --- | --- | --- | --- | | [Ring Sizer - Ring Size Measure](https://appshunter.io/ios/app/ring-sizer-ring-size-measure/id6479995221) | 4.6 (182) | Free | Utilities | | [Ring Sizer: AR Ruler & Table](https://appshunter.io/ios/app/ring-sizer-ar-ruler-and-table/id6473256428) | 4.6 (51) | Free | Utilities | | [Ring Sizer: Ring Size](https://appshunter.io/ios/app/ring-sizer-ring-size/id6760242241) | — | Free | Utilities | | [Ring Sizer.](https://appshunter.io/ios/app/ring-sizer/id6502053455) | 4.7 (90) | Free | Utilities | | [Ring Sizer Tool](https://appshunter.io/ios/app/ring-sizer-tool/id6466219535) | 4.7 (600) | Free | Utilities | | [Ring Sizer - Measure Ring Size](https://appshunter.io/ios/app/ring-sizer-measure-ring-size/id6477376330) | 4.4 (78) | Free | Utilities | ## More apps by LEAN ASIA CO., LTD - [LED Scroller: Banner Text Sign](https://appshunter.io/ios/app/led-scroller-banner-text-sign/id6746079598) - [4K Wallpapers: HD Backgrounds](https://appshunter.io/ios/app/4k-wallpapers-hd-backgrounds/id6746153811) - [Lume: Mood Tracker & Diary](https://appshunter.io/ios/app/lume-mood-tracker-and-diary/id6748694093) - [Birthday Card Maker & Reminder](https://appshunter.io/ios/app/birthday-card-maker-and-reminder/id6749825114) - [Go Fly for DJI Drones Control](https://appshunter.io/ios/app/go-fly-for-dji-drones-control/id6749890660) - [Truth or Dare: Spin Bottle](https://appshunter.io/ios/app/truth-or-dare-spin-bottle/id6751531465) All apps by LEAN ASIA CO., LTD: https://appshunter.io/developer/1815050814 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-23.*