Ring Sizer vs Ringbox
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Ring Sizer
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Estimate your ring size with your iPhone camera and a standard-sized card. Measure an existing ring or a finger, check the detected edges, and compare sizes across international charts. MEASURE WITH A PHOTO Place a ring on or beside an 85.60 Γ 53.98 mm card on a flat surface. For fingers, place the card above a relaxed, spread-out hand. Use the level guide, take a photo, or choose an existing picture. The app uses the card as a scale reference and corrects perspective in the cardβs plane. CHECK THE FIT Review the card corners and ringβs inner edge with a magnifying view. Move the ring circleβs center or radius to refine the result. For fingers, slide the measurement along the detected finger to check a wider section or knuckle. CONVERT RING SIZES Compare 15 sizing systems, including US/Canada, UK/Australia, European circumference, Japan, Hong Kong, mainland China, Taiwan, India, Brazil, South Korea, Argentina and Chile. Choose your country, preferred size system, and millimeters or inches. Published charts vary, so check your jewelerβs chart before ordering. KEEP YOUR MEASUREMENTS Save results, photos and adjustments in History. Reopen a measurement to review it, add a note, or compare sizes. Your measurement folders are also available in the Files app. Delete one measurement or clear them all in Settings. ON-DEVICE PROCESSING Measurement photos are processed on your iPhone. No account, advertising or tracking is required. The app does not upload measurement photos to a server. iOS backups and files you choose to share are controlled by you. BEFORE YOU ORDER Results are estimates, not a guaranteed fit. Lighting, camera angle, object height and card placement can affect accuracy. Finger circumference is estimated from visible width; fingers are not perfect circles. Scan a few times and confirm with a physical ring sizer or jeweler before purchasing. Terms of Use: https://www.x-tech.io/apps/ringsizer/terms Privacy Policy: https://www.x-tech.io/apps/ringsizer/privacy
Ringbox
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Find your ring size on your screen β 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 β’ Ring on screen β 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. β’ Paper strip β no ring to hand? Wrap a strip of paper around your finger, mark where it overlaps, and lay it on the true-scale ruler. β’ Finger on screen β a quick estimate when you just want a ballpark. We label it honestly as Β±1 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 β 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 β’ Save any ring with a name, the person, the hand and the finger β’ Add a photo and the background is removed on device β a clean cut-out of the ring itself β’ 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 β a Home Screen isn't private. WIDGETS, REMINDERS, PAPER β’ Home Screen widgets: one ring, a grid of your collection, or your size across every system β’ Gift reminders for birthdays and anniversaries, with the size right there in the notification β’ A printable paper ring sizer (PDF, Letter or A4) with a print-scale check, so you know it came out at 100% β’ 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
The clearest difference is in-app purchases: Ring Sizer at none against Ringbox's 4. Ringbox's advantage is iOS requirement (16.4 vs 18.0). On price, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Ringbox sells 4 in-app purchases, starting at $6.99 per 7 days. Ring Sizer asks for nothing beyond the download.
| Parameter | Ring Sizer | Ringbox |
|---|---|---|
| Price | Free | Free |
| Update frequency | β | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Devices | iPhone | iPhone, iPad β better |
| Requires iOS | 18.0 | 16.4 β better |
| Further details β not scored | ||
| Size | 84 MB | 73 MB |
| Age rating | 4+ | 4+ |
| Developer | Xanthous Tech LLC | Juan Antonio Veloz Gutierrez |
In-app purchases
Ring Sizer
No in-app purchases
Ringbox
- Diamond plan β Weekly7 Days trial$6.997 Days
- Diamond plan β Yearly$24.991 Year
- Diamond plan β Lifetime deal$17.49
- Diamond plan β Lifetime$39.99








