# GDB vs Primo Jewelry

The clearest difference is in-app purchases: GDB at none against Primo Jewelry's 2. GDB also leads on update cadence (every 2 weeks vs every 2 months) and iOS requirement (13.0 vs 15.0). Primo Jewelry's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Primo Jewelry sells 2 in-app purchases, starting at $7.99 per 7 days. GDB asks for nothing beyond the download.

GDB ships an update every 2 weeks, Primo Jewelry every 2 months. The most recent releases landed on October 2, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | GDB | Primo Jewelry |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/primo-jewelry-ring-sizer/id6771894523/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | — | Freemium |
| Size | 89 MB | 25 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GDBUY HOLDING PTY LTD](https://appshunter.io/developer/1725907839) | [Primo Technology Ltd.](https://appshunter.io/developer/1809398942) |

## What reviewers say

### GDB

[App page](https://appshunter.io/ios/app/gdb/id6479289674)

**Features:** macOS Compatibility

**In-app purchases:** none


### Primo Jewelry

[App page](https://appshunter.io/ios/app/primo-jewelry-ring-sizer/id6771894523)

Instantly identify jewelry and estimate its resale value using AI. Features a precise ring sizer that uses your phone's camera and a bank card for accurate measurements in multiple international sizes.

**Highlights:** AI jewelry identification, Resale value estimation, Comparable sold listings, Camera ring sizer, Multiple international ring sizes, Local scan history

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Primo Jewelry Premium - Weekly | $7.99 | per 7 days |
| Primo Jewelry Premium - Yearly | $29.99 | per year |


## Frequently asked questions

### Is GDB free?

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

### Is Primo Jewelry free?

Primo Jewelry is free to download, with in-app purchases available.

### Do GDB or Primo Jewelry have ads?

GDB shows ads; Primo Jewelry does not.

### Which is updated more often, GDB or Primo Jewelry?

GDB ships an update every 2 weeks, and Primo Jewelry every 2 months. Most recently, GDB was updated on October 2, 2026 and Primo Jewelry on October 28, 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.*