Comparison

Ring Sizer vs DIAMETRO

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Ring Sizer

Accurately measure your finger or an existing ring directly from your smartphone. This tool supports multiple international sizing standards and provides easy-to-use visual guides for confident jewelry purchases.

Highlights
  • Measure finger or ring size
  • Supports international size standards
  • Easy visual guides
  • Save and share sizes
  • No tools required
Features
Read full description

RingSizer – Find Your Perfect Fit! Measure your finger or ring quickly and accurately—right from your phone. Whether you're buying jewelry online or planning a surprise proposal, RingSizer ensures a perfect fit every time. Key Features: - Measure your finger or existing ring with precision - Supports international size standards (US, UK, EU, AU, JP, CN, IN) - Easy-to-use visual guides - Save and share sizes with ease No tools, no guesswork—just a simple, reliable way to get your size right the first time. Download RingSizer today and shop with confidence. Suggestions or questions? Email us at support@rozumind.com Terms of Use: https://www.rozumind.com/terms-and-conditions Privacy Policy: https://www.rozumind.com/privacy-policy

About

DIAMETRO

Read full description

Find your ring size in seconds, right on your iPhone. Place a ring you already own on the calibrated circle, slide until the bubble fills the inside of the ring, and DIAMETRO shows its size in EU/ISO, US, UK, CH and JP, plus the exact diameter and circumference. HOW IT WORKS • Calibrate once with a bank card or a coin for true physical scale • Lay your ring on the screen • Slide until it fits, then save the result DIAMETRO PRO • Finger measurement: enter the circumference of your finger and get a recommended size, with optional knuckle compensation • All accent colors • Unlimited saved measurements • Printable PDF sizer, export and backup (PDF, CSV, JSON) ALSO INSIDE • Light and Dark mode • English, Romanian and French PRIVATE BY DESIGN No account. No tracking. Your measurements stay on your device. Conversions are approximate. Confirm your size with a jeweler before buying.

Screenshots

Ring Sizer4 screens
DIAMETRO4 screens

Verdict

The call

The clearest difference is update cadence: DIAMETRO at every 2 weeks against Ring Sizer's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Ring Sizer ships an update every 2 months, DIAMETRO every 2 weeks. The most recent releases landed on October 19, 2026 and October 21, 2026 respectively.

Scorecard1 real difference · 8 level
Ring Sizer versus DIAMETRO: the parameters behind the verdict, then further details
ParameterRing SizerDIAMETRO
PriceFreeFree
Rating4.5 (10 ratings) — better—
Number of ratings10 — better—
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.017.0
Further details — not scored
Size10 MB4 MB
Age rating4+4+
DeveloperAliaksei MikhailouskiALEXANDRU TEODOR TRANDAFIR

In-app purchases

None

Ring Sizer

No in-app purchases

None

DIAMETRO

No in-app purchases

Questions

Is Ring Sizer free?
Ring Sizer is free to download, with no in-app purchases.
Is DIAMETRO free?
DIAMETRO is free to download, with no in-app purchases.
Do Ring Sizer or DIAMETRO have ads?
Neither Ring Sizer nor DIAMETRO shows ads.
Which is updated more often, Ring Sizer or DIAMETRO?
Ring Sizer ships an update every 2 months, and DIAMETRO every 2 weeks. Most recently, Ring Sizer was updated on October 19, 2026 and DIAMETRO on October 21, 2026.

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