# The Diamond Store Ring Sizer vs Concept Pro AI Link

The clearest difference is update cadence: Concept Pro AI Link at monthly against The Diamond Store Ring Sizer's every 8 months. The Diamond Store Ring Sizer's advantage is iOS requirement (13.0 vs 16.6). On price, ads, in-app purchases and device support there is nothing between them.

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

The Diamond Store Ring Sizer ships an update every 8 months, Concept Pro AI Link monthly. The most recent releases landed on October 9, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | The Diamond Store Ring Sizer | Concept Pro AI Link |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 23.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Monthly** |
| Monetization | Free | — |
| Size | 5 MB | 104 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TheDiamondStore.co.uk](https://appshunter.io/developer/981926075) | [Concept Pro Surveillance](https://appshunter.io/developer/1820158853) |

## What reviewers say

### The Diamond Store Ring Sizer

[App page](https://appshunter.io/ios/app/the-diamond-store-ring-sizer/id972698219)

Easily determine ring sizes in UK, EU, or USA measurements using your phone. Simply place an existing ring on your screen and adjust a circle to match its inner diameter, perfect for keeping gifts a surprise.

**Highlights:** Accurate ring size measurement, Supports UK, EU, and USA sizing, Covers all sizes F-Z, Easy to use interface, Keeps gift purchases a surprise

**Features:** macOS Compatibility

**In-app purchases:** none


### Concept Pro AI Link

[App page](https://appshunter.io/ios/app/concept-pro-ai-link/id6747365428)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is The Diamond Store Ring Sizer free?

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

### Is Concept Pro AI Link free?

Concept Pro AI Link is free to download, with no in-app purchases.

### Do The Diamond Store Ring Sizer or Concept Pro AI Link have ads?

Neither The Diamond Store Ring Sizer nor Concept Pro AI Link shows ads.

### Which is updated more often, The Diamond Store Ring Sizer or Concept Pro AI Link?

The Diamond Store Ring Sizer ships an update every 8 months, and Concept Pro AI Link monthly. Most recently, The Diamond Store Ring Sizer was updated on October 9, 2026 and Concept Pro AI Link on October 18, 2026.

---

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