About this app

The simplest way to find your ring size - no paper, no string, no jeweler required. Place your ring on the screen, adjust the circle, and get your exact size in seconds. One tool, every size standard, zero subscriptions. WORKS TWO WAYS - Place an existing ring on screen to match the size instantly - Measure your finger directly using the on-screen guide EVERY SIZE STANDARD INCLUDED - US / Canada - UK / Australia - Europe / ISO - Japan / China - Millimeters & inches BUILT FOR THE MOMENT - Engagement ring shopping - Wedding band ordering - Jewelry gifts - measure while they sleep - Online ring purchases with no size guide WHY RING SIZER - No subscription - $4.99 once, yours forever - Save your measurements for every finger - Lightweight - under 5MB - Clean, accurate, no bloat HOW IT WORKS 1. Place your ring on the circle on screen 2. Drag the slider until the circle matches your ring 3. Read your size in any international standard 4. Save it - never measure again Whether you're buying an engagement ring or ordering jewelry online, get the size right the first time. No subscriptions. No nonsense. $4.99. https://www.apple.com/legal/internet-services/itunes/dev/stdfla/

Latest release

What’s New

Version 1.1 Apr 28, 2026

- performance improvement - Onboarding Experience

Audience growth

Ratings growth

Steady

7-day gain +0

Ratings / day 0.0

30-day gain +0

US rating-count history

0 ratings

Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking