# Ring Sizer - Ring Size Finder — Find Your Ring Size Fast

> Measure ring size accurately at home using your finger or a ring. (iPhone/iPad app by 100 Factories.)

- Source: https://appshunter.io/ios/app/ring-sizer-ring-size-finder/id6760617077 (this page in markdown: same URL + `.md`)
- Developer: [100 Factories](https://appshunter.io/developer/1559484344)
- Category: Utilities
- Price: Free
- Rating: 4.80/5 from 5 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: American English
- Released: 2026-03-19
- Data updated: 2026-08-21
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/ring-sizer-ring-size-finder/id6760617077/reviews.md

## What is Ring Sizer?

Find your ring size in seconds — no trip to the jeweler needed.

MEASURE WITH YOUR FINGER
Place your finger on the screen and adjust the guide to estimate your size. Great when you don't have a ring to compare.

MEASURE WITH A RING
Place a ring you already own on the screen and match the circle to the inside edge. The most accurate way to find your size at home.

EVERY SIZE SYSTEM YOU NEED
See your result in US/CA, UK, JP, diameter (mm & inch), and circumference (mm) — all at once, no switching.

SCREEN-CALIBRATED ACCURACY
Auto-detects your iPhone model for precise on-screen measurements.

SAVE & COMPARE
Label and save measurements for yourself, a partner, or family. Come back anytime to check.

Free. No ads. No account required.

## Key features

- Measure with finger
- Measure with existing ring
- Multiple size systems
- Screen-calibrated accuracy
- Save and compare measurements

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/ring-sizer-ring-size-finder/id6760617077/reviews.md

### 5/5 — 꽤 정확함

*2026-03-21*

반지 사이즈 잴 일 있어서 써봤는데 일단 UI가 엄청 깔끔해서 쓰기 쉽고 반지 사이즈도 정확한 것 같아요 굳굳!

**Developer response:** 제설 님, 따뜻한 후기 남겨주셔서 정말 감사합니다. 반지 사이즈를 정확하게 측정하는 데 도움이 되었다니 기쁘네요. 앞으로도 깔끔하고 편리한 앱이 될 수 있도록 계속 노력하겠습니다.

## Frequently asked questions about Ring Sizer

### How does Ring Sizer measure my ring size?

Ring Sizer offers two methods: placing your finger on the screen and adjusting a guide, or placing an existing ring on the screen and matching its inner edge to a circle. The app auto-detects your iPhone model for precise on-screen measurements.

### What ring size systems does Ring Sizer support?

Ring Sizer displays results in US/CA, UK, JP, diameter (mm & inch), and circumference (mm) all at once, eliminating the need to switch between different systems.

### Can I save my ring size measurements with Ring Sizer?

Yes, you can label and save measurements for yourself, a partner, or family members. You can revisit these saved measurements anytime.

### Is Ring Sizer accurate?

The app is designed for screen-calibrated accuracy and auto-detects your iPhone model to enhance precision. Measuring with an existing ring is noted as the most accurate method.

### Does Ring Sizer have ads?

No, Ring Sizer is completely free with no advertisements. It also does not require an account to use.

### What devices is Ring Sizer available on?

Ring Sizer is currently supported on iPhone devices.

### How often is Ring Sizer updated?

The app was last updated on March 21, 2026, indicating recent development and support. The latest version is 1.1.

### What is the age rating for Ring Sizer?

Ring Sizer has an age rating of 4+, making it suitable for a wide range of users.

## Version history (last 2 releases)

### 1.1 — 2026-03-21

Bug fixes and improvements.

### 1.0 — 2026-03-19

No release notes.

## More apps by 100 Factories

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- [냉장고터는날 - 자취요리, 간단요리 레시피 앱](https://appshunter.io/ios/app/id1583480720)
- [알바살려 - 동전 분류, 킬링 타임](https://appshunter.io/ios/app/id1589678329)
- [농산물 실시간 경매 - 최신 농산물 경매 거래내역 확인](https://appshunter.io/ios/app/id1605831935)
- [JPG/PNG Converter](https://appshunter.io/ios/app/jpgpng-converter/id1616400402)

All apps by 100 Factories: https://appshunter.io/developer/1559484344

## Related topics

[free ring sizer tool on iphone](https://appshunter.io/ios/topics/free-ring-sizer-tool-on-iphone) · [ring size finder](https://appshunter.io/ios/topics/ring-size-finder) · [find my ring size](https://appshunter.io/ios/topics/find-my-ring-size)

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*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 2026-08-21.*