# Ring Sizer Pro vs Feng

The clearest difference is price: Feng at Free against Ring Sizer Pro's $1.99. Feng also leads on rating (5.0 vs 2.0) and update cadence (every 3 weeks vs every 4 months). Ring Sizer Pro's advantage is iOS requirement (13.0 vs 17.6). On review sentiment, ads, in-app purchases and device support there is nothing between them.

Feng is free to download; Ring Sizer Pro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Feng holds the better App Store score, 5.0 against 2.0. That said, the two scores are not equally well evidenced: Feng has 12 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Ring Sizer Pro ships an update every 4 months, Feng every 3 weeks. The most recent releases landed on September 21, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Ring Sizer Pro | Feng |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/ring-sizer-pro/id1064173293/reviews) | **[5.0 (12 ratings)](https://appshunter.io/ios/app/feng-shui-compass/id6737935866/reviews)** |
| Number of ratings | 1 | **12** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Size | 2 MB | 19 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mike Melnikov](https://appshunter.io/developer/398340766) | [9 Earth LLC](https://appshunter.io/developer/1778564731) |

## What reviewers say

### Ring Sizer Pro

[App page](https://appshunter.io/ios/app/ring-sizer-pro/id1064173293)

Easily determine your jewelry ring size with this accurate tool. It offers multiple measurement units, visual guides, and supports numerous international sizing systems. Share your findings effortlessly.

**Highlights:** Metric and imperial units, Diameter or circumference measurement, Visual guides for precision, Shareable results, Multiple international sizing systems, Wide size range support

**Features:** Apple Watch app

**In-app purchases:** none


### Feng

[App page](https://appshunter.io/ios/app/feng-shui-compass/id6737935866)

This app provides the functionality of a professional Feng Shui compass on your mobile device. It offers accurate direction measurements and detailed calculations for various aspects of a space, functioning as both a specialized Feng Shui tool and a regular compass.

**Highlights:** Professional Feng Shui compass functionality, Accurate direction measurements, Feng Shui calculations for spaces, Early and Later Heaven Ba Gua rings, 24 Mountains and 60 Jia Zi rings, Flying stars for all periods, Zoom-in view for clear measurements

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ring Sizer Pro free?

Ring Sizer Pro costs $1.99, with no in-app purchases.

### Is Feng free?

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

### Which has better reviews, Ring Sizer Pro or Feng?

Feng is rated higher. Ring Sizer Pro averages 2.0 out of 5 from 1 ratings, while Feng averages 5.0 from 12 ratings.

### Do Ring Sizer Pro or Feng have ads?

Neither Ring Sizer Pro nor Feng shows ads.

### Which is updated more often, Ring Sizer Pro or Feng?

Ring Sizer Pro ships an update every 4 months, and Feng every 3 weeks. Most recently, Ring Sizer Pro was updated on September 21, 2026 and Feng on June 1, 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.*