DiamCalc Standard 2.x is just 280 US$.

* At this page you can only purchase the DiamCalc 2 software. If you want to purchase Upgrade from DiamCalc 1.x to DiamCalc 2.x please contact the support service

IMPORTANT NOTE: THE LICENSE GIVES YOU THE RIGHT TO USE DIAMCALC ON A SINGLE COMPUTER (IDENTIFIED BY THE REGISTRATION NUMBER YOU WERE PROVIDED DURING REGISTRATION). WHENEVER YOU WANT TO USE THE DIAMCALC ON ANY OTHER COMPUTER(S) YOU HAVE TO PURCHASE ADDITIONAL LICENSE(S).

If you would like to buy DiamCalc with PayPal, follow these steps:

1. Download it from OctoNus Software WWW page or mirror site. The software is locked and will work as a demo-version (Marquise cut only) until purchased.
2. Install the software on the same computer where you plan to use it (see "Installation Guide").
3. Run DiamCalc to be sure that it is compatible with your computer configuration, OS and other installed applications. If you see a message "The software has expired" press OK button, otherwise run Help/Register menu command.
4. You will be presented with the "Register dialog" with the following fields:
   • Serial number. It identifies the instance of DiamCalc that you bought. The serial number will be given to you during a purchase process.
   • Registration number. It identifies the computer where the software is installed.
   • Registration key. It allows to use the software on the specific computer.
   Write down the "Registration number" as it will be required in the next steps.
5. Open your WWW browser and go to this page to step # 6. If your computer does not have an Internet connection or you prefer to connect Internet from a different computer then open WWW browser on the different computer.
6. Click on the "PayPal buy it now" button below and follow instructions on the Web page to complete the purchase. When you are presented with the "Special Instructions (optional)” filed, please enter the Registration number in this filed.
7. When the purchase is completed, you will be granted with a serial number and a registration key to activate all DiamCalc features. Enter them into "Register" dialog and press Register button. If registration is successful, the next time you start DiamCalc all features will be enabled.