RingSizer vs Circlet

RingSizer turns your iPhone into a precision jeweler's tool — no ring sizer, no guesswork, no trip to the store. MEASURE YOUR RING Already have a ring that fits? Place it flat on your screen and align it with the on-screen guide. RingSizer uses your device's exact screen dimensions — with optional bank-card calibration for extra precision — to calculate your true size. MEASURE YOUR FINGER No ring on hand? Use the two-step Ellipse Method. Fingers aren't perfectly round, so RingSizer measures both width and thickness for a scientifically accurate fit, based on the same math jewelers use. CONVERT BETWEEN SYSTEMS Instantly convert between EU, US, UK, Japanese, Australian and Swiss/German ring sizes — or look up any size by diameter and circumference. LIFE-SIZE RULER A true-to-scale on-screen ruler for measuring anything small, in mm, cm or inches. FEATURES • High-accuracy ellipse-based finger measurement • Bank-card screen calibration for pixel-perfect results • Worldwide size conversion (EU, US, UK, JP, AU, CH/DE) • Save and organize your measurement history • Evening measurement reminder — fingers swell throughout the day, so a second reading helps you land on your truest size • Private by design — your measurements never leave your device RingSizer Premium unlocks unlimited history, expert fitting advice, and full worldwide size conversion — with a one-time purchase, no subscription. Whether you're buying a ring as a surprise, replacing a lost one, or shopping online, RingSizer gives you a confident, accurate answer in seconds.

Circlet measures ring size the way a jeweller does, with nothing to buy and nothing to sign up for. SET A RING ON THE SCREEN Put any ring you already own on the drawn one and match the inside edges. Drag the bead, pinch, or scrub the millimetre ruler. Your size appears instantly in your own country's system. NO RING? NO PROBLEM Wrap a strip of paper around the finger, mark it, and lay it on Circlet's true-scale ruler. Honest guidance on the knuckle, the time of day, and the weather — the things that make other apps "not accurate." EVERY SIZE SYSTEM US and Canada, UK and Australia, EU/ISO, Japan and China, Italy and Spain — plus the millimetres, which never lie. SEND IT TO WHOEVER IS BUYING Share a card with the size in every system and the wearer's preferences: metal, stone, a note. Or ask someone for their size with one message. Rings are bought by one person for another; Circlet is built for both. ACCURATE ON ANY iPHONE OR iPAD Circlet knows your screen's pixel density. If it doesn't, lay a bank card on the screen once and it will. ONE PRICE, ONCE Measuring is free. Everything else — every size system, the no-ring method, unlimited saved sizes — is a single purchase. Never ads. Never a subscription. Nothing leaves your phone. Circlet is made by Country Boy Creative.