# Ring Sizing vs AuthTech Authenticator

The clearest difference is iOS requirement: AuthTech Authenticator at 12.0 against Ring Sizing's 26.0. On price, update cadence, ads 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.

Ring Sizing ships an update every 10 months, AuthTech Authenticator every 7 months. The most recent releases landed on August 17, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Ring Sizing | AuthTech Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/ring-sizing/id1466446037/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 7 months** |
| Monetization | Free | — |
| Size | 10 MB | 31 MB |
| Requires iOS | 26.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Gerhard Lentschik](https://appshunter.io/developer/629988041) | [Capricorn Identity Services Pvt. Ltd.](https://appshunter.io/developer/1460233583) |

## What reviewers say

### Ring Sizing

[App page](https://appshunter.io/ios/app/ring-sizing/id1466446037)

Accurately measure ring sizes using your phone's screen. Determine diameter, circumference, and convert between international sizing systems. Ideal for jewelers and shoppers needing precise measurements.

**Highlights:** Measure ring diameter on screen, Determine circumference in mm/inches, Pacher method calculation, International size conversion (EU, US, UK, JP), Precise slider for measurement

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

**In-app purchases:** none


### AuthTech Authenticator

[App page](https://appshunter.io/ios/app/authtech-authenticator/id6445812771)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ring Sizing free?

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

### Is AuthTech Authenticator free?

AuthTech Authenticator is free to download, with no in-app purchases.

### Do Ring Sizing or AuthTech Authenticator have ads?

Neither Ring Sizing nor AuthTech Authenticator shows ads.

### Which is updated more often, Ring Sizing or AuthTech Authenticator?

Ring Sizing ships an update every 10 months, and AuthTech Authenticator every 7 months. Most recently, Ring Sizing was updated on August 17, 2026 and AuthTech Authenticator on September 26, 2026.

---

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