Ring Sizer vs Knuckle

Find your perfect ring size in seconds with Ring Sizer — the easiest and most accurate way to measure rings and fingers directly from your iPhone or Apple Watch. Whether you're shopping for an engagement ring, wedding band, or buying jewelry online, Ring Sizer helps you get the right fit without visiting a jeweler. Simply place a ring on your screen or measure your finger using our guided tools to instantly discover your size across multiple international sizing systems. Features • Accurate ring and finger measurement • Measure rings directly on your screen • Finger sizing without needing an existing ring • Supports US, UK, EU, JP, AU & international sizes • Easy-to-use visual sizing guides • Fast and intuitive interface • Works on iPhone, iPad, and Apple Watch • Perfect for engagement rings, wedding bands & online jewelry shopping No complicated tools. No guesswork. Just precise sizing whenever you need it. Whether you're planning a surprise proposal, buying jewelry online, or checking your current size, Ring Sizer gives you confidence with accurate measurements in just a few taps. Download Ring Sizer today and find your perfect fit instantly.

Knuckle turns your screen into a ring sizer. Lay a ring you already own flat on the display, match the gold circle to the inside of the band, and read the size. That is the whole thing. No camera, no printing, no paper strips to cut out, no trip to a jeweler. Before the first measurement you line a bank or ID card up against an outline, once, so Knuckle learns exactly how large a millimetre is on your particular screen. Every reading after that is true to your device. You get the inner diameter in millimetres next to the sizes people actually ask for - US, UK, EU, Japan, Australia, Hong Kong and Italy. Each result carries an honest confidence band instead of one number pretending to be certain. Sizes are worth keeping. Save one under the person it belongs to, note the finger and the hand, and look it up later while you are standing in the shop. Send a clean size card to whoever is buying. Nothing leaves your device. No account, no sign in, and it all works with the network switched off. Privacy Policy: https://docs.google.com/document/d/e/2PACX-1vTDX9pxPOlUJl_skVUHPi99mAw0y2B2BYd_v1mJkoF3xW3rlOcW5KlYd4t93MMbbGhctSTnBTy7d_l6/pub Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/