Price List

Effective 19/Apr/2022 (subject to change without notice)

Prices are shown in pounds sterling and US dollars. US$ prices only apply to 30-day account orders from customers in the USA. All other transactions are processed in pounds sterling, including all orders paid by credit/debit card or PayPal. Prices are exclusive of VAT or other local duties/taxes, where applicable. Orders can be submitted via our on-line Order Form or by email to . Orders are accepted subject to our standard Terms and Conditions of Sale.

Winteracter is supplied electronically. Each licence is supplied by email, which includes download instructions.

Please refer to our Ordering Information page for more details of how to order and pay.

New Licences

There are three products, one each for Windows, Linux and Mac. Each licence includes libraries for use with all of the compilers currently supported on that platform, as listed below.

15.0Windows Absoft Pro Fortran 11 onwards (32/64-bit)
GNU gfortran (MingGW) 4.7/4.9/5.x-10.x (32/64-bit)
Intel Fortran 11 onwards (32/64-bit)
Lahey/Fujitsu Fortran 5.7/7.x (32-bit)
Lahey/GNU Fortran (32/64-bit)
Salford/Silverfrost FTN95/Win32 (32-bit)
£595 (US$795)25%
15.0Linux Absoft Pro Fortran 11 onwards (64-bit)
GNU gfortran 5.x-10.x (64-bit)
Intel Fortran 11 onwards (64-bit)
NVIDIA Fortran (64-bit)
£595 (US$795)25%
15.0Mac Absoft Pro Fortran 11 onwards (64-bit)
GNU gfortran 5.x-10.x (64-bit)
Intel Fortran 14 onwards (64-bit)
£595 (US$795)25%


  • All prices quoted above are for a single-user licence, use of which is subject to the Winteracter Licence Agreement. See Multi-item Discounts below for details of multiple licence pricing.
  • Windows Winteracter licences can be used on either 32-bit or 64-bit operating systems. Linux and Mac licences are 64-bit.


Users of any previous Winteracter version can upgrade to the latest release. Prices depend on your current version number. Upgrades are available for the same platform only.

Current version number
14.x 13.0/12.0 10.x/11.0 9.x 1.0-8.0

Important : Please quote your 5-digit Winteracter serial number (8nnnn or 4nnnn) when ordering upgrades.

Commercial Licences

Prices shown are for a Winteracter Commercial Licence entitling the purchaser to install a single copy according to the terms of the Winteracter Licence Agreement. Linked executable programs developed using Winteracter under a Commercial Licence may be distributed without further royalty or run-time licence payments to ISS.

Educational Licences

An educational discount is available to qualifying institutions, subject to the following condition : Software developed using Winteracter under an Educational licence may only be distributed to other educational and research establishments, on a non-profit making basis. i.e. Such software may only be distributed free of charge or subject to reasonable media/handling charges.

Educational discount should be applied before calculating any multi-item discounts. An Educational licence can be upgraded to a full Commercial licence for the difference in cost plus the currently applicable one-off upgrade fee.

Educational discount is applicable to both new licence and upgrade orders.

Multi-item Discounts

When purchasing multiple licences/upgrades, a discount of 20% is available off all but the most expensive item ordered. Orders must be placed at one time to qualify for this discount. Multi-item discount is not available on split orders.


To place an order, use the on-line Order Form or send an email to . When ordering by email, please be sure to state the required target platform (i.e. Windows, Linux or Mac).

Full ordering instructions can be also found on our Ordering Information page.


Winteracter can be ordered direct from ISS or from various international resellers.

Hardcopy/Export Drivers

Winteracter includes a full set of graphics hardcopy/export drivers at no extra charge.


ISS operates a free of charge Winteracter technical support email service. Registered Winteracter licence holders may submit bug reports and other Winteracter related enquiries by email to this service. ISS reserves the right to vary the nature, availability and lifetime of this free of charge service at our sole discretion. In general, we aim to respond to technical support enquiries within one working day of receipt.

For more information email:

Please note : References to "support for" specific third party software do not imply endorsement of same. Refer to Supported Compilers/Platforms for more information.