# Ring Sizer vs Fx PRO

The clearest difference is iOS requirement: Fx PRO at 13.0 against Ring Sizer's 17.0. 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.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 19, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Ring Sizer | Fx PRO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (10 ratings)](https://appshunter.io/ios/app/ring-sizer-measure-ring-size/id6654909479/reviews)** | — |
| Number of ratings | **10** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 10 MB | 119 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Aliaksei Mikhailouski](https://appshunter.io/developer/1682692291) | [Fx Solucoes Em Seguranca Ltda](https://appshunter.io/developer/1888735689) |

## What reviewers say

### Ring Sizer

[App page](https://appshunter.io/ios/app/ring-sizer-measure-ring-size/id6654909479)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Fx PRO

[App page](https://appshunter.io/ios/app/fx-pro/id6761296701)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ring Sizer free?

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

### Is Fx PRO free?

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

### Do Ring Sizer or Fx PRO have ads?

Neither Ring Sizer nor Fx PRO shows ads.

### Which is updated more often, Ring Sizer or Fx PRO?

Ring Sizer ships an update every 2 months, and Fx PRO every 2 months. Most recently, Ring Sizer was updated on October 19, 2026 and Fx PRO on October 7, 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.*