# MyGemeWizard vs TDC

The clearest difference is update cadence: MyGemeWizard at every 2 months against TDC's every 5 months. MyGemeWizard also leads on iOS requirement (8.0 vs 13.0). 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.

MyGemeWizard ships an update every 2 months, TDC every 5 months. The most recent releases landed on October 7, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | MyGemeWizard | TDC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/mygemewizard/id1160136762/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free | — |
| Size | 30 MB | 65 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gemewizard LTD](https://appshunter.io/developer/1077355166) | [Rapaport Diamond Calculator](https://appshunter.io/developer/1819215968) |

## What reviewers say

### MyGemeWizard

[App page](https://appshunter.io/ios/app/mygemewizard/id1160136762)

This app provides a digital system for communicating and grading gemstone colors, aligning with industry standards. It helps standardize color descriptions, streamline trade, and increase consumer confidence across the gemstone industry.

**Highlights:** Digital color communication system, Industry-standard GIA alignment, Standardized gem color descriptions, Database of 1146 gem color images, Color grading for over 50 gemstone types, Share color information via messaging

**Features:** macOS Compatibility

**In-app purchases:** none


### TDC

[App page](https://appshunter.io/ios/app/tdc-diamond-calculator/id6746962078)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MyGemeWizard free?

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

### Is TDC free?

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

### Do MyGemeWizard or TDC have ads?

Neither MyGemeWizard nor TDC shows ads.

### Which is updated more often, MyGemeWizard or TDC?

MyGemeWizard ships an update every 2 months, and TDC every 5 months. Most recently, MyGemeWizard was updated on October 7, 2026 and TDC on October 5, 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.*