Ring Sizer vs Ringbox
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Ring Sizer
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Find your ring size in 30 seconds โ right on your iPhone screen. No plastic sizer, no trip to the jeweller. TWO WAYS TO MEASURE โข I have a ring: lay a ring that fits on the screen and grow the gold circle until it exactly fills the hole. The circle is drawn at true physical size, so its diameter is your ring size. โข Measure my finger: wrap a paper strip around your finger, mark the overlap, lay it on the on-screen ruler and drag the marker to your mark. EVERY SIZE SYSTEM Your result in US & Canada, UK & Australia, Europe (ISO), diameter in mm, Japan & China, Italy, Spain & Switzerland and France โ plus a complete size chart from US 3 to 13. PERFECT FOR SURPRISES Planning a proposal or a gift? Measure one of their rings secretly and save it in My Sizes until the big day. ACCURATE ON EVERY IPHONE The app knows the exact screen size of every iPhone model. For a new model or a thick screen protector, calibrate once with any bank card in 20 seconds. PRO Unlimited saved sizes for the whole family and every country's size system. Choose weekly, monthly or yearly (with a 3-day free trial), or a one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. Tips: measure in the afternoon at room temperature, and go half a size up for wide bands. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ringbox
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Find your ring size on your screen โ no guessing, no printing, no trip to a jeweler. Ringbox turns your iPhone into a true-to-scale ring sizer. Lay a ring you already own flat on the display, match the circle to it, and read your size in every system used worldwide. It takes about ten seconds. THREE WAYS TO MEASURE โข Ring on screen โ the most accurate. Size the circle to the ring's inner edge. A magnifier follows your finger so you can see the exact moment the edges meet, and a haptic tick marks every quarter size. โข Paper strip โ no ring to hand? Wrap a strip of paper around your finger, mark where it overlaps, and lay it on the true-scale ruler. โข Finger on screen โ a quick estimate when you just want a ballpark. We label it honestly as ยฑ1 size and tell you to confirm with a ring or a strip before you buy. EVERY SIZING SYSTEM US & Canada, UK & Australia, Europe/ISO, Japan & China โ plus inner diameter and circumference, in millimeters and inches. Type a size in any system and the converter shows all the others. The full ring size chart runs US 3 to 16 in half sizes. ACCURATE, AND HONEST ABOUT IT Ringbox knows your exact screen size, so the circle is drawn at real physical scale rather than scaled to a guess. If your model isn't recognized, calibrate in seconds against any bank card. Double-check compares two measurements taken different ways and gives you a confidence badge, with a guided fix when they disagree. Between sizes? It tells you to round up, and why. The fit tips are built in, too: wide bands need a little more room, fingers swell through the day, and the ring has to clear the knuckle. A DRAWER FOR YOUR RINGS โข Save any ring with a name, the person, the hand and the finger โข Add a photo and the background is removed on device โ a clean cut-out of the ring itself โข Group rings by person: you, your partner, your mom, whoever SURPRISE-PROOF Sizing a ring for a proposal? Secret profiles are hidden behind Face ID, so their rings, photos and sizes stay out of sight. A reminder about a secret person never shows a name or a size on your Lock Screen, and secret people are left out of widgets โ a Home Screen isn't private. WIDGETS, REMINDERS, PAPER โข Home Screen widgets: one ring, a grid of your collection, or your size across every system โข Gift reminders for birthdays and anniversaries, with the size right there in the notification โข A printable paper ring sizer (PDF, Letter or A4) with a print-scale check, so you know it came out at 100% โข Share cards showing a size in every system, with the ring's photo PRIVATE BY DEFAULT It all happens on your iPhone. Photos are cut out on device, sizes are stored on device, and nothing needs an account or an internet connection. Available in English, Spanish, French, German, Italian, Portuguese, Chinese and Hebrew. THE DIAMOND PLAN Ringbox requires the Diamond plan. Measure your ring size once during setup, then choose Weekly, Yearly or Lifetime to use the app: all three ways to measure, every sizing system, the chart and converter, unlimited rings and people, photo cut-outs, secret profiles with Face ID, double-check confidence, widgets, gift reminders, the printable sizer and share cards. Lifetime is a one-time purchase. Weekly and Yearly are auto-renewable subscriptions; the first year of Yearly is offered at a lower price, paid up front. Subscriptions renew automatically unless canceled at least 24 hours before the period ends; manage or cancel in your App Store account settings. Prices are shown in the app and vary by region. Privacy Policy: https://veloz.dev/ringsizer-privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
Ring Sizer and Ringbox are too close to call on the numbers: across 6 compared parameters โ price, update cadence, ads and in-app purchases among them โ neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Ring Sizer sells 4 in-app purchases, starting at $2.99 per 7 days and Ringbox sells 4 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Ring Sizer ships an update weekly, Ringbox every 2 weeks. The most recent releases landed on October 25, 2026 and October 29, 2026 respectively.
| Parameter | Ring Sizer | Ringbox |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly โ better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone, iPad โ better |
| Requires iOS | 17.0 | 16.4 โ better |
| Further details โ not scored | ||
| Size | 9 MB | 73 MB |
| Age rating | 4+ | 4+ |
| Developer | Heinz Meier | Juan Antonio Veloz Gutierrez |
In-app purchases
Ring Sizer
- Pro Weekly$2.997 Days
- Pro Monthly$3.991 Month
- Ring Sizer Pro Yearly3 Days trial$12.991 Year
- Ring Sizer Pro Lifetime$17.99
Ringbox
- Diamond plan โ Weekly7 Days trial$6.997 Days
- Diamond plan โ Yearly$24.991 Year
- Diamond plan โ Lifetime deal$17.49
- Diamond plan โ Lifetime$39.99









