# DIAMETRO: Ring Sizer — Measure ring size on screen

> Measure ring size on screen (iPhone/iPad app by ALEXANDRU TEODOR TRANDAFIR.)

- Source: https://appshunter.io/ios/app/diametro-ring-sizer/id6810555116 (this page in markdown: same URL + `.md`)
- Developer: [ALEXANDRU TEODOR TRANDAFIR](https://appshunter.io/developer/6810555118)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 4 MB
- Languages: American English, French (France), Romanian
- Released: 2026-09-14
- Data updated: 2026-10-04

## What is DIAMETRO?

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.

## Is DIAMETRO safe?

Not enough ratings yet to assess DIAMETRO.

## Is DIAMETRO legit?

DIAMETRO: Ring Sizer has limited verification signals. The AppsHunter Legitimacy Score for DIAMETRO is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.1 — 2026-10-01

New app icon and a faster start: DIAMETRO now opens straight into the app. Share your result as a card in one tap, follow a quick first-run guide, and see the measuring circle more clearly.

### 1.0 — 2026-09-14

No release notes.

## Apps similar to DIAMETRO

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Screen Ring Sizer](https://appshunter.io/ios/app/screen-ring-sizer/id6810426891) | — | Free | Utilities |
| [RingMeter: Ring Size Finder](https://appshunter.io/ios/app/ringmeter-ring-size-finder/id6767339352) | — | Free | Utilities |
| [FitMyRing](https://appshunter.io/ios/app/fitmyring/id6784221328) | — | Free | Utilities |
| [Ruler & Digital Caliper](https://appshunter.io/ios/app/ruler-and-digital-caliper/id6806950163) | — | Free | Utilities |
| [Ring Sizer: Measure & Try On](https://appshunter.io/ios/app/ring-sizer-measure-and-try-on/id6759631149) | — | Free | Utilities |
| [Netograf](https://appshunter.io/ios/app/netograf/id1451848149) | — | Free | Utilities |

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-04.*