Ring Sizer vs Karat

Ring Sizer is a simple tool for checking ring size directly on your iPhone. Open the app, place a ring on the screen, and adjust the circle with the smooth slider until it matches the inside edge of the ring. The selected size and inner diameter are shown clearly, so you can check the result without searching through conversion tables. The app supports JP, US, EU, and UK size systems. It automatically chooses a default based on your device language and region, and you can change it anytime from the size menu. The slider moves by size steps with subtle haptic feedback, making the measuring experience quick and satisfying. You can also save sizes for your own fingers. Store sizes for the left and right hand, from thumb to little finger, and review them later in the My Fingers tab. Ring Sizer is designed with a calm, feminine beige style that keeps the measuring circle easy to see while still feeling polished. It is perfect for checking rings at home, comparing sizes before shopping, or keeping a personal ring-size note.

Find your ring size in under a minute — no printables, no guessing, no trip to the jeweler. Karat turns your iPhone into a precise ring sizer. Place any ring on the screen, match the golden circle to its inside edge, and instantly get your size in US, UK, EU, TR and JP standards — plus the exact diameter in millimeters. PLANNING A SURPRISE PROPOSAL? Borrow one of their rings for 60 seconds. Measure it quietly, save it as "Her size" or "His size", and hand the jeweler an exact number. The secret stays safe — and the ring fits on the first try. HOW IT WORKS 1. Calibrate once — Karat auto-detects your iPhone model for millimeter accuracy (you can verify with any bank card). 2. Place a ring on the screen and match the circle — or measure your finger directly between the guides. 3. Get your size instantly, in every international standard. WHY KARAT • Ring measurement using your existing ring — the most accurate phone-based method • Finger measurement mode when you don't have a ring at hand • Full conversion chart: US · UK · EU · TR · JP · mm • Save unlimited sizes: yours, your partner's, gifts for family • Sizing tips from jewelers: when fingers swell, how wide bands fit, comfort fit vs standard • Works 100% offline. No account. No location. Your data never leaves your phone. ACCURACY YOU CAN TRUST Karat calibrates to your exact screen down to the pixel-per-millimeter. For important purchases like engagement rings, we still recommend confirming with a professional jeweler — Karat gets you the right starting size without leaving home. Your first measurement is free. Unlock unlimited measurements, saved sizes and the full conversion chart with Karat Pro. KARAT PRO SUBSCRIPTION Karat Pro is available as an auto-renewing weekly subscription. The price is shown in the app before purchase. Payment will be charged to your Apple ID account at confirmation of purchase. The subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions anytime in your App Store account settings after purchase. Privacy Policy: https://usappstudio.com/privacy-policy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/