# HAJ: Jewelry Identifier — Gold Detector & Purity Tester

> Gold Detector & Purity Tester (iPhone/iPad app by MONAD SYSTEMS LTD.)

- Source: https://appshunter.io/ios/app/haj-jewelry-identifier/id6793474381 (this page in markdown: same URL + `.md`)
- Developer: [MONAD SYSTEMS LTD](https://appshunter.io/developer/6777074225)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 46 MB
- Languages: American English
- Released: 2026-08-02
- Data updated: 2026-08-15
- User reviews in markdown: https://appshunter.io/ios/app/haj-jewelry-identifier/id6793474381/reviews.md

## What is HAJ?

HAJ: Jewelry Identifier is a practical gold-testing and jewelry record app designed to help jewellers calculate density and review estimated purity using hydrostatic weight measurements.

Create a new test by entering the customer name, jewelry weight in air, suspended weight in water, and any required touch adjustment. Select the relevant alloy assumption—Copper, Mixing, or Silver—and the app automatically calculates the density and displays the estimated purity-related result.

The app also helps you calculate testing charges, labour fees, and the net payable amount. Completed tests can be saved as receipts and accessed later through the customer history.

Key Features

• Record jewelry weight in air and water
• Automatically calculate gold density
• View estimated purity-related results
• Choose Copper, Mixing, or Silver alloy assumptions
• Add customer and testing information
• Calculate rate, test charges, and labour fees
• Generate and save test receipts
• Search previous records by customer
• Access jeweller contact details through WhatsApp or call

Start a new test, enter the hydrostatic readings, review the calculated result, and keep your jewelry-testing records organized with HAJ: Jewelry Identifier.

Terms of Use:
https://sites.google.com/monadsystems.net/terms-of-use/home

Privacy Policy:
https://sites.google.com/monadsystems.net/privacy-policy/home


## Version history (last 1 release)

### 1.0.1 — 2026-08-03

No release notes.

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All apps by MONAD SYSTEMS LTD: https://appshunter.io/developer/6777074225

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-15.*