Read it here.

All our payment are processed trough PayPal, therefore you can use credit card, debit card or money transfer orders. Even if you don't have a PayPal account or you don't want to open one, you can still use their service to pay here.

More information about the payment system can be found in their own website.

Yes. We accept credit cards trough the system, which is one of the more safest and reliable online payment systems.

Just open a support ticket and we'll do our best to help you.
Follow this link to the support site and create a ticket.

No. You just need your everyday browser to use our on-line software. Javascript must be enabled in your browser.

Any modern browser should work: Firefox, Chrome, Opera or Internet Explorer.

Text based browser are not supported, sorry Lynx.

Create a support ticket.

Let us know also which type of calculation you were doing, when and any error that appear on screen.

We'll try to track it down and restore your lost points. This is possible in almost the 99% of the cases.