# International Ring Sizer vs Ultrahuman Ring Sizer

The clearest difference is rating: International Ring Sizer at 3.5 against Ultrahuman Ring Sizer's 2.0. International Ring Sizer also leads on review sentiment (44% vs 18%) and device support (3 vs 1). Ultrahuman Ring Sizer's advantage is ads (none vs shown) and update cadence (monthly vs every 20 months). On price and in-app purchases there is nothing between them.

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

International Ring Sizer holds the better App Store score, 3.5 against 2.0. That said, the two scores are not equally well evidenced: Ultrahuman Ring Sizer has 24 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 44% of International Ring Sizer's written reviews are positive against 18% of Ultrahuman Ring Sizer's.

International Ring Sizer ships an update every 20 months, Ultrahuman Ring Sizer monthly. The most recent releases landed on September 28, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | International Ring Sizer | Ultrahuman Ring Sizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/international-ring-sizer/id1378100751/reviews)** | [2.0 (24 ratings)](https://appshunter.io/ios/app/ultrahuman-ring-sizer/id6452756334/reviews) |
| Number of ratings | 2 | **24** |
| Positive reviews | **44.4% of reviews** | 17.6% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 20 months | **Monthly** |
| Monetization | Ad-supported | **Free** |
| Size | 6 MB | 45 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Red Detour, LLC](https://appshunter.io/developer/1378100750) | [ULTRAHUMAN HEALTHCARE PRIVATE LIMITED](https://appshunter.io/developer/1491286708) |

## What reviewers say

### International Ring Sizer

[App page](https://appshunter.io/ios/app/international-ring-sizer/id1378100751)

Measure your ring size accurately using an existing ring. This utility helps you find the perfect fit without needing a physical sizer. Ideal for online jewelry purchases.

**Highlights:** Measure ring size with existing rings, Accurate sizing for online purchases, Simple and intuitive interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Ultrahuman Ring Sizer

[App page](https://appshunter.io/ios/app/ultrahuman-ring-sizer/id6452756334)

Instantly determine your ring size by taking a photo of your hand. The app uses advanced AI vision algorithms to accurately calculate your perfect fit, requiring only a standard-sized card in the frame for reference.

**Highlights:** Instant ring size calculation, AI-powered vision algorithm, Photo-based measurement, Requires standard card for reference, Accurate fit determination

**In-app purchases:** none


## Frequently asked questions

### Is International Ring Sizer free?

International Ring Sizer is free to download, with no in-app purchases.

### Is Ultrahuman Ring Sizer free?

Ultrahuman Ring Sizer is free to download, with no in-app purchases.

### Which has better reviews, International Ring Sizer or Ultrahuman Ring Sizer?

International Ring Sizer is rated higher. International Ring Sizer averages 3.5 out of 5 from 2 ratings, while Ultrahuman Ring Sizer averages 2.0 from 24 ratings.

### Do International Ring Sizer or Ultrahuman Ring Sizer have ads?

International Ring Sizer shows ads; Ultrahuman Ring Sizer does not.

### Which is updated more often, International Ring Sizer or Ultrahuman Ring Sizer?

International Ring Sizer ships an update every 20 months, and Ultrahuman Ring Sizer monthly. Most recently, International Ring Sizer was updated on September 28, 2026 and Ultrahuman Ring Sizer on October 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*