Register Your CalculatorPlease enter the date of the PayPal order and the email address you used:
FireFox Browser UsersWhen you enter your PayPal order information and go to the next page you will be asked if you want to allow the calculator to work in "Offline Mode". Click the "Allow" button if you would like to use the calculator when you are NOT connected to the Internet:
Other browsers automatically allow Offline Mode.
EXCEPT Internet Explorer which DOES NOT SUPPORT OFFLINE MODE in versions earlier than Internet Explorer 10.
If you would like to use the calculator in Offline Mode please consider downloading and installing one of these modern browsers:
- iPad: all versions with current software
- iPhone: 2.1+
- Android: 2.0+ (phones and tablets)