# AuthSky vs Ring Sizer

The clearest difference is in-app purchases: AuthSky at none against Ring Sizer's 2. AuthSky also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Ring Sizer sells 2 in-app purchases, starting at $3.99 per 7 days. AuthSky asks for nothing beyond the download.

AuthSky ships an update every 2 months, Ring Sizer every 3 months. The most recent releases landed on October 18, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | AuthSky | Ring Sizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ring-sizer-finger-measure-app/id6761365066/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | — | Freemium |
| Size | 26 MB | 14 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [HAWSABAH TECHNICAL FOR INFORMATION TECHNOLOGY](https://appshunter.io/developer/1494153876) | [GUNAYDIN APP STUDIO](https://appshunter.io/developer/1888018712) |

## What reviewers say

### AuthSky

[App page](https://appshunter.io/ios/app/authsky/id6746695556)

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

**In-app purchases:** none


### Ring Sizer

[App page](https://appshunter.io/ios/app/ring-sizer-finger-measure-app/id6761365066)

Easily determine your perfect ring size from home using your phone's screen or camera. Get accurate measurements in seconds and convert between international sizing standards.

**Highlights:** Measure finger size on screen, Measure existing ring size on screen, Accurate camera measurement, International ring size conversion, Works offline, Easy to use interface

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| premium | $3.99 | per 7 days |
| premium | $29.99 | per year |


## Frequently asked questions

### Is AuthSky free?

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

### Is Ring Sizer free?

Ring Sizer is free to download, with in-app purchases available.

### Do AuthSky or Ring Sizer have ads?

Neither AuthSky nor Ring Sizer shows ads.

### Which is updated more often, AuthSky or Ring Sizer?

AuthSky ships an update every 2 months, and Ring Sizer every 3 months. Most recently, AuthSky was updated on October 18, 2026 and Ring Sizer on October 11, 2026.

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