DiamCalc 2.x Standard is just $280.
Upgrade from version 1.x to 2.x: $80 (registered DiamCalc 1.x users only).

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).

At the moment, purchasing of DiamCalc can be done only via the Internet. If you would like to buy DiamCalc, 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 "Instalation Guide").
3. Run DiamCalc to be sure that it is compatible with your computer configuration, OS and other installed applications. You will see a message "The software has expired". Press OK button.
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.
5. Click "Buy via Web" button to open your WWW browser and go on with the purchase. If your computer does not have an Internet connection or you prefer to connect Internet from a different computer, see topic "Registering DiamCalc from a different computer".
6. Follow instructions on the Web page to complete the purchase.
7. When the purchase is completed, you will be granted with a serial number and a registration key to activate all 3DCalc features. Enter them into "Register" dialog and press Register button. If registration is successful, the next time you start 3DCalc all features will be enabled.