Terms of Use

App: Jewelers Handbook for iOS (iPhone and iPad) Developer: Pavel Yakimenko Effective date: 1 November 2026

These terms apply to your use of the Jewelers Handbook app and this website. By using the app you agree to them.

License

You may use the app for personal and professional work on Apple devices you own or control, as permitted by the App Store terms. You may not copy, resell or redistribute the app or its content as your own product.

Reference content and estimates

Jewelers Handbook is a reference and a set of calculators. Gemstone data, cut and setting descriptions and clasp information are compiled from the published sources listed in the app. Calculation results (chain weight and length, number of rings, carat estimates, metal weight, ring sizes) are estimates based on models, tables and typical densities. Actual results depend on your materials, tools and technique. Always check with a test piece, scales and gauges before making a piece, and follow your supplier's data and the safety rules of your workshop.

3D illustrations are explanatory, not technical drawings. Actual size on screen depends on your device and calibration.

No warranty

The app and its content are provided "as is", without warranties of any kind, including accuracy, completeness or fitness for a particular purpose.

Limitation of liability

To the extent permitted by law, the developer is not liable for any loss of materials, damaged stones or pieces, lost time, or other damages arising from the use of the app or reliance on its content.

App Store terms

If you obtained the app from the App Store, Apple's standard Licensed Application End User License Agreement also applies. Apple is not responsible for the app or its content.

Privacy

How data is handled is described in the Privacy Policy.

Changes

These terms may be updated. The new version will be published on this page with a new effective date.

Contact

Questions about these terms: dreamcomenull@gmail.com