RingMeter vs Ring Sizer
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
RingMeter
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For online jewelry shoppers who need to know their exact ring size before buying. For partners planning to propose who want to measure secretly without asking. For people sorting through inherited or estate jewelry who need to know which ring fits whom. For wide wedding band buyers who need a more accurate fit than standard sizers can give. RingMeter is the ring sizer that just works. โ Place any ring flat on the screen and align the on-screen circle to its inner edge to read the exact size โ Get instant readings in 14 country standards โ US, UK, EU, Japan, China, Australia, India, Canada, Mexico, Italy, Spain, Germany, Russia, Hong Kong, and Brazil โ at the same time โ Wide band? Enter the band width in millimeters and the app applies comfort-fit compensation automatically, so wedding bands and signet rings fit right โ Measure your finger directly with the on-screen ruler when no reference ring is available โ Save sizes for everyone โ partner, parents, siblings, friends โ and never guess again when buying gifts โ Track every ring you own in a private inventory: diameter, finger fit, optional reference photo, and personal notes. Perfect for organizing estate jewelry, coordinating surprise gifts, or running a small jewelry business โ Export a printable PDF paper sizer with reference circles and a measuring strip, for situations where the phone screen can't be used or to mail an exact size to a jeweler โ Calibrate accuracy with a credit card or coin using the international ISO/IEC 7810 standard โ No system permissions required. No camera, no microphone, no location, no contacts. โ No account. No login. No data ever leaves your iPhone. โ No advertisements. No third-party SDKs. No analytics. โ Long press a profile to edit, swipe to delete, tap + to add a new family member or ring โ Switch between diameter and circumference display modes anytime โ Choose your default sizing standard so the size you care about always shows first โ Re-calibrate the screen anytime if you switch devices or display zoom settings Built for iOS 17. 100% offline. No data collection. No ads. 3-day free trial included. Terms of Use: https://taxlite.net/ring_meter/terms.html Privacy Policy: https://taxlite.net/ring_meter/privacy.html
Ring Sizer
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Planning a surprise proposal but don't know their ring size? Ring Sizer turns your iPhone into an accurate ring measuring tool. Place a ring on the screen, size a finger, or use a simple piece of string โ then read the US, UK & EU size in seconds. No printing. No guessing. Your first measurement is free, and the Size Converter is always free to use. Unlimited measurements and saved sizes for your whole family require a Ring Sizer Pro subscription. A free trial is available. Whether you're secretly sizing a partner's ring for an engagement, ordering a wedding band online, or checking your own finger before buying jewelry, Ring Sizer helps you find your size in under a minute โ no jeweler visit required. HOW IT WORKS โข On-Screen Ring Sizer โ place any existing ring on your screen and match it to the adjustable circle for an instant reading โข Finger Size Finder โ put your finger on the display and drag the sliders until they touch both sides โข String Method โ no screen to calibrate? Wrap a piece of string or paper around your finger, enter the length, and get your size right away โข Size Converter (free) โ convert any size between US, UK/AU, EU/ISO and Japanese standards, and switch between diameter and circumference in mm, cm and inches โข Instant Conversion Chart โ see your measured result across every standard at a glance PERFECT FOR A SECRET PROPOSAL Borrow a ring they already wear (from the correct finger!), place it on the screen, and get the size in seconds. Put it back before anyone notices. The surprise stays a surprise. WHY RING SIZER โข Calibrated to your device โ the on-screen scale is matched to your exact iPhone model โข Every standard covered โ full international ring size chart built in โข Save sizes (Pro) โ keep your partner's, your own, and family members' sizes for future gifts โข Works offline โ measure anywhere, no connection needed โข No printer and no jeweler visit required BUYING JEWELRY ONLINE? Online jewelry returns are often caused by one thing: the wrong size. Measure with Ring Sizer first, then order engagement rings, wedding bands, and everyday jewelry with more confidence. TIPS FOR AN ACCURATE MEASUREMENT โข Measure at the end of the day when fingers are at their normal size โข Avoid measuring when hands are cold โ fingers shrink โข If you're between two sizes, choose the larger one โข Wide bands fit tighter โ consider going up half a size MEASUREMENT STANDARDS SUPPORTED US & Canada, UK & Australia, EU (ISO 8653), Japan, plus raw diameter and circumference in millimeters and inches. Download Ring Sizer today and never guess a ring size again. SUBSCRIPTION INFORMATION Ring Sizer Pro unlocks: โข Unlimited measurements with the On-Screen Ring Sizer, Finger Size Finder & String Method (your first measurement is free) โข Saved sizes and profiles for you and your family Subscription Options: โข Weekly: $5.99/week (with a 3-day free trial) โข Yearly: $29.99/year (Best Value) Payment will be charged to your iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period. Privacy Policy: https://bgmobiledev.com/privacy-policy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
RingMeter and Ring Sizer 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. RingMeter sells 4 in-app purchases, starting at $1.99 per 7 days and Ring Sizer sells 2 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.
RingMeter ships an update every 10 days, Ring Sizer every 2 weeks. Both last shipped on October 28, 2026.
| Parameter | RingMeter | Ring Sizer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 days โ better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details โ not scored | ||
| Size | 2 MB | 1 MB |
| Age rating | 4+ | +4 |
| Developer | ZHENGQIAO JIANG | Burak Guner |
In-app purchases
RingMeter
- Weekly3 Days trial$1.997 Days
- Monthly$4.991 Month
- Yearly$29.991 Year
- Lifetime$79.99
Ring Sizer
- Weekly Plan3 Days trial$5.997 Days
- Annual Plan$29.991 Year








